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Show 150 APPENDIX. Skeleton similar in form to Furnar:••' lS cun;•c ularius, and the other species of this genus. II eo Length of sternum . .•• • •.•.. • · . · · · • • • • • • · · · · · · · • · · 11 Breadth nnteriorly . •• .•• . ..•••• • • • • • • • • • • • • • • • • • • • 6 posteriorly ••.. . ..•. . .. . · • • · · · · · · · · · • · · • · 7! Depth of keel . .. • ..•. ... ••• · · · • • • · · · · · • · • · · · · · · · · 4f of fissures . .. . .. . ... .. . ... • • • · · · · · · · • · · · · · 4 Breadth of ditto . .• • ••.. . • • · . · · · • · · · • · • · • • · · · · · · · · 1i Length of pelvis ..•....... . .... . . • · · · · · · · · · · · · · · · · 12 Breadth anteriorly .. ... . .. .... .... · · .. : .. · ...... · · ~ posteriorly .. ..... ... . ......... ... · .. .... 10& Length from occiput to point of bill . .. .. •... . · · • • • • 18 Breadth of cranium .. .. .. • ••.• . •• •. . · . · • · · • · • · • · · · · 7& Length of coracoids .... . ... . ...••. . .. · · · · · · · · · · · · 9 N.,. Of cervical vertebrm ................. . .. • .. · .. 11 dorsal ditto •...•.• · · · · • · · · · · · • • • · • • · · · · · · · · 7 sacral ditto •. • ...• ... ..•• · · . · • • · . • • · · · · · • · · 12 caudal ditto ••.. ..••.•••• ··· .'.·········· · · ·· 7 Total .. • .. ...•.. . 37 No. of true ribs ........ .... .... · · .............. .. 6 false d.itto .............. .. .......... ·.. .. . 2·1 Total.......... .. 8 OPETIORHYNCHUS PATAGONICUS. G. R. Gray. (Male.) No difference in the structure of the soft parts from the other species of the genus before spoken of. The trachea, however, does not differ fi'Om the ordinary simple form found in most birds, but differs from 0. vulgaris and 0. antarcticus, in having the lower rings continued to the bronchire it is acted upon by one pair of muscles ; no cooca are apparent. lnchoa lnchea I Length ofgcelzzsaoprdha. gu, . .s'. •in·c··l·u·d·i n. g. ·p·ro·• v•c·n·t·rl·c•u•l•u•s• • • •• •• .• .. .. 2~ Breadth of gizzard • • • , •••.•.••••••••..• . ••.• , • . . . . i ~ Length of cutis from gizzard to cloaca . . . . . . • . • • . • . . 0! Skeleton in form similar to that of Purnarius cunicularius, and the other species of this genus. linea Length of sternum , . . • . . . . . . . . . . . . . . . . . • . . . . . . . . . • 1 S Breadth anteriorly . .. ..... .... . . . .. . ... .. . .. .... . , 6& posteriorly •••• . .........•. • , , •.. , . . , .• .. , . 8i Depth of keel . . . . . .. . . . . . . • . . . . . . . . . . . . . . . . . • • • •• li fissures ..•• . .•........ •.... . . . . •.. •• •••.• 4 Breadth of ditto , • • . . . . . . . . . . . . . . . . . . . . • . . . . • • . . . . 1i Length of pelvis . . . .. .. . .. . . ...... .. ...... , ••.. • . , 13~ Breadth anteriorly .... , , ...... .. .... , . ....... , .. .. 6 posteriorly . .. ••... . • • • •. ......• . ••••. , . . 10~ Length from occiput to point of bill ••...•.•.• , • • • • . 19 Breadth of cranium .. .. .. .. .. . .. .. . .. .. .. .. . .. .. . 8 Length of corneolds .. .. .. .. .. .. .. .. .. • • .. .. .. • .. . 10 No. of cervical vertebrw . , . . .. .. . . .. .. .. .. • • • . .. .. 11 dorsal ditto .••..•. , . . . . • • • . . • . . . . • • • • • • • • • • 7 sacral ditto .. .. .. . . . .. • • • . . .. . . .. . . .. . . .. . . 9 caudal ditto . . . .••. .. ...•••...•••.••••• • •... Total .......... .. 38 No. of true ribs .............................. .. false ditto .. .. .. . .. • .. .. .. .. .. .. .. .. .. .. 2·1 Total ••..•.•••• Remarks :-the last five species approach so nearly, that I doubt the propriety of separating them gene1·ically. The Rkeletons are only distinguishable with the exception of the form of the bill, by the proportions between the different admeasurements. PTEROPTOCHOS TARNII. G.R. Gray. (Female.) Tongue pointed, armed with two strong lateral spines, and a few intermediate smaller ones at the base; oosophagus largest at the upper extremity, and gradually becoming smaller towards the proventriculus ; no vestige of a craw ; proventt·iculus of moderate size, not much contracted towards the gizzard, which is also of moderate size, and much flattened; not very muscular, and lined with a hardened coat, rugose longitudinally; the gizzard was filled with small 1 BIRDS. 1 .'51 pebbles, .and a coarse black powder, probably the remains of insects; intestinal canal small; cooca ruchmental; rectum large, becoming more expanded towards the cloaca, which is also large ; trachea of equal diameter throughout, furnished with one pair of sterno-tracheal muscles, a portion of each of which is continued downwards to the upper rings of the bronchi~ on which it expands; liver two-lobed. ' Inches Length of cesophngus, including proventriculus , , .. , . 3~ of intestinal canal, from gizzard to cloaca ••.. .. 18 of rectum . •. . ... .. .... . . . .•• . • , • , . . . . .. . , 2i Diameter of gizzard . ....... . . ..... . .. ... , .. .. .. .. fo Length of ditto . . • • . . . . . . . . . . . . . . . . • . . . . . . . . . . . . . 1 Jnchet The pelvis and ribs of this bird were much damaged ; sternum of equal breadth posteriorly and anteriorly, slightly contl·acted on its lateral edge, near the middle indented on its posterior margin with four deep fissures, the outer ones la1·gest; a large triangular process projecting forwards between the junctions of the coracoids, bifid at the apex; the corncoids themselves very strongly articulated to the sternum, the sides of the sternum to which the ribs are articulated projecting in the form of a process fat· beyond the junction of the coracoids; the sternal keel is nar~ow, and has its edge straight; the coracoids are long, thin, with very slight external lateral processes at their junction with the sternum; os furcatum very thin, roundish, a very slight process on the point at which it approaches nearest to the sternum, very slightly arched. Scapula bl'Oad, flattened, much widened at about one-third of its length fi·om the hinder extremity ; wing bones short, and weak ; leg bones long, and strong ; the fibula much developed. llnos Length of sternum ••••.•.• . .• ..•. .•.. ••• ••. , . • • . • . 16 Greatest breadth of sternum . . . . . . . . . • . . . . . . . . . • . . . . 9~ Breadth at the narrowest part . •••••• , . , •. , • . •• , • • . . 7 Width of ext ernal fissure .. ........ ...... .. ...... , , 1& Depth of ditto •••.. , .. . • •. . •. .• , ..• , . . •••• , . . • . • • . 6 Width of internal ditto . . . . . . . . . . . . . . . . . . . . . . • . . . . . ll Depth of dit to . . . . • • • • . . . . . . • . . . . • . . . . . . • . . • . . . . 6l Depth of keel ...• , , . •.....•••...• , .•• • ••. , ••• . •. . lim•• Length from occiput to point of bill . . . . . • . . . • . . . . . . 2Zi Breadth of cranium .... ••..•...... .. . . ... , . • ... . . 10& Length of coracoids . . . . .. .. . . . . .. . . . . . . . . . . . . .. .. ]] Breadth of scapula iu the broadest part .... , . . . . . . • . . ~ Cervical vcrtebrw . . . . . . . . • • . . . . . . • . • . . . . . . . . . 12 Dorsal ditto . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Sacral, damaged. Caudal, damaged. PTEROTOCHOS ALBICOLLIS. Kittl. (Male.) Trachea, tongue, oosophagus, gizzard, and liver of the same form as in Pterotochos Tarnii. The contents of the gizzard also did not differ. In ches inches Length of intestinal canal .. ........... , ..... . . . .. .. 144 Len!th of gizzard .... .... .... . ...... . .......... .. from cmca to cloaca .... . , ............ • • .. .. 2& Breadth of ditto . . .. ......................... , .. .. Only the body, after skinning, of the species, was brought home by M1·. Darwin. The skeleton of this species does not diffet· in anything but admeasurement!~ ft·om that of Pterotor:ltos Tarnii; the pelvis, however, being so much damaged in that species, that I was not able to make many notes upon it, I shall give a description of that part in the present one.' Pelvis of moderate size; the ossa pubiil and ischium much expanded, and elongated posterwrly, and placed nearly perpendicular to the plane of the ilium, ischiatic foramina large; two large pt·ocesses arise on the ilium on each side of the junction of the caudal vertebroo for the attachment of the levator muscles of the tail. |