1882.J 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 glohicera. (J, 2 . 



alector. d , 2 • 



sclateri. c? > $ • 



dauheyitoni, c? > $ • 



alberti. c? , 5 . 



caruncidata. d , 2 • 



[The females only of C, globulosa and C incommoda have yet been 

 examined. The trachea is simple.] 



Pauxis galeata. d ,2 • 

 Mitua tuberosa. d" , $ . 



tomentosa. d", $ . 



Ortalis albiventris. c? , 2 • 



garrula. S • [The $ according to Humboldt ' has the trachea 



simple.] 

 mottnot. S • [The female has a simple trachea according to 



Latham, who describes this species" under the name of Phasianus 



parralca.'\ 



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 ciijubi 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^. 

 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. NuMiDiDiE. 

 The Guinea-fowls of the genus Gutter a, as seen in both sexes 



' Humboldt and Bonpland, ' Eecueil d'observations de Zoologie,' &c. p. 5. 

 Paris, 1811. 



2 Linn. Trans, iv. p. 100 &c. 



Proc. Zool. Soc— 1882, No. XXIV. 24 



