OCR Text |
Show 70 DR. A. GUNTHER ON THE ZOOLOGICAL [Feb. 6, 4. RHIZOCHILUS (CORALLIOPHILA) PARVUS, sp. nov. (Plate X L fig. 6.) Testa parva, fusifor mi-ovata, vix rimata, alba; anfractus circiter 7, convexiusculi, longitudinaliter plicati, plicis obliquis 10-11 validis, et liris spiralibus rugosis fortibus (in anfr. penult. 5-6, in ultimo circa 18, alternatim majoribus) cincti; apertura cceruleo-alba, pyriformis, ad basim canalem brevem aliquanto recurvum jungens, longitudinis totius | paulo superans; labrum crenulatum, intus denticulatum. Longit. 10^ millim., diam. fere 6. This pretty species is of a short fusiformly-ovate shape, entirely white ; the whorls are spirally lirated, two of the lirations on the upper whorls being stouter than the others ; and those on the last are regularly alternately large and small, the stout ones being twice as thick as the latter. The aperture is bluish white, pyriform, and prolonged into the basal channel, which is somewhat recurved ; the columella is straightisb, thinly callous, smooth and shining; the labrum is strongly crenulated on the margin and armed within with about ten lirations, which do not extend far within the aperture. Although there are not any very striking peculiarities in this little shell, still it does not satisfactorily agree with any other species. For its size the spiral ribs are remarkably stout, and are more conspicuous than the oblique plications. 5. COLUMBELLA FUSCATA, Sowerbv. Panama, Mazatlan, West Columbia, and Peru are other localities where this species has been found. 6. LATIRUS VARICOSUS, Reeve. It is curious that the single specimen obtained by Commander Cookson is in exactly the same worn condition as the shells originally described. 7. LATIRUS TUBERCULATUS, Broderip. Also found on the west coast of Central America. 8. MITRA (STIGATELLA) TRISTIS, Swainson. This species is also quoted from Mazatlan, Panama, and St. Elena, West Columbia. 9- CONUS NUX, Broderip. 10. CIRITHIUM MACULOSUM, Kiener. 11. CALYPTRiEA, Sp. There are two small specimens of a species of this genus in the collection, probably the young stage of C. tortilis, Reeve, or G. al-veolata, A. Adams, both of which are described as inhabitants of these islands. One of them has taken up its abode in the shell of a dead Fissurella, and has curiously extended the margin of its shell through the apical hole. |