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Show 308 PROF. HUXLEY ON THE ALECTOROMORPHAE. [May » becomes larger in the Peristeromorphce and in many other the Musophac/idee among the rest. , - , *Fr.«/k The bones of the fore limb in part resemble those of the Fowls and in part those of the Pigeons; while the humerus has a great deal of resemblance to that of Corythaix ; ^ ^ ^ / . ^ ^ ^ S r u m place between Corythaix and Crax. The bones of the ^ r a c h i um and the manus, on the other hand, are much nearer to those ot Pigeons than they are to those of ^ ^ ^ ^ The pelvis (figs. 10 k 11) is more nice m ^ . t i.i • of Corythaix] bit, though it resembles both it differs ombort^ n the absence of any ilio-pectineal process, and in the circumstance that tbe ilio-sacral fossae are completely roofed over by b n - obturator foramen, as in many Gallinaceous birds, is not bounded by bone behind ; in Corythaix it is. y Fig. 11. Fig. 10. Figs. 10 & 11. Lateral and dorsal view of the pelvis of Opisthocomus. The relative proportions and form of the femur and the tibia are very nearly such as are observable in the ordinary Pigeons. The metatarsus is longer in proportion to the tibia than in the ordinary Pigeons, shorter than it is in Goura. The tarso-metatarsus itself (fig. 12, p. 309) very closely resembles that of the Pigeons, though the form of the distal articular surface of the metatarsal of the hallux is more like that of Crax. The tarso-metatarsus of Corythaix is very different. The middle toe is considerably longer than the tarso-metatarsus, and slightly longer than the femur. It is not so long as the femur in any Gallinaceous bird, nor in Corythaix. In the ordinary Pigeons it is considerably longer than the tarso-metatarsus ; in Corythaix just as long. |
