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Show 1882.] MANUCODIA ATRA AND OTHER BIRDS. 351 Fam. CRACID^E. In the males of the genera Crax, Pauxis, Mitua, and Ortalis the trachea forms a loop of variable extent, often extending, particularly in the last three genera, to the end of the carina sterni, and then turning up a little way on the left side before it returns. In other cases it extends only about as far as the anterior end of the carina. In the females this loop is altogether absent, or at most the trachea presents a slight curve in the neck. Species examined. Crax ylobicera. <$, 2 . alector. cf, 2 . sclateri. cS, 2 • daubentoni. cf, $ • alberti. cf, $ . carunculata. cf > 9 • [The females only of C. globulosa and 0. incommoda have yet been examined. The trachea is simple,] Pauxis galeata. cf, 2 • Mitua tub erosa. c?, $ . tomentosa. cf, $ . Ortalis albiventris. cf, 2 • garrula. cf . [The 2 according to Humboldtl has the trachea simple.] motmot. cf • [The female has a simple trachea according to Latham, who describes this species2 under the name of Phasianus parrakai] In Penelope jacucaca the trachea is convoluted in both sexes ; and the same is the case in the male of P. pileata, the condition of the female being unknown. [In Penelope cristata and P. purpurascens the male has no loop ; and the same is the case in Pipile cumanensis and P. jacutinga. Only females of Pipile cujubi and Nothocrax urumutum have yet been examined : these had simple tracheae ; and the same is the case in both sexes of Aburria carunculata.^ B. The trachea has a considerable superficial loop in the cervical region, anterior to the thoracic muscles. Fam. PHASIANID^E. Tetrao urogallus. The male only, apparently. C. The trachea has a loop entering into, and inclosed by, a bony cavity formed by the clavicular symphysis. Fam. NUMIDID.E. The Guinea-fowls of the genus Guttera, as seen in both sexes 1 Humboldt and Bonpland, 'Eecueil d'observationa de Zoologie,'&c. p. 5. Paris, 1811. 2 Linn. Trans, iv. p. 100 &c. PROC. ZOOL. SOC-1882, No. XXIV. 24 |
