of the Foot in Birds. 



389 



Pe'ecanoides [Procellariidte] *. 



Phcpnicoparra [Phcenicopteridse]. 



Otididje. 



CEdicnemididae (incl. Esacus). 



Cursorius. 



Turnicidie (exc. Pedmiomus). 



Syrrhnptes [Pteroclidse]. 



Aicidse. 



Cliaradriidae (many p'onera, e. g. Cha- 

 radrius, JI(S?)mtopus, Iloplopterus, 

 Calidris). 



jRissa (at least generally; cf. Saun- 

 ders, P. Z. S. 1878, pp. 1G2, 1G3) 

 [Laridaj]. 



Sasia, Picoides, Tic/a {Vh'i^-X:']. 



Jacamarahyun [GalbulidiB]. 



B, By suppression of the 2nd digit. 

 Ceyx, Alcyone [Alcedinidaej. 



C. By suppression of the 4tli digit. 



Chulvrnis [Oscines]. 



II. The Number of Phalanges. 

 The normal number of phalanges in birds is^ as already 

 stated, 2, 3, 4, 5, in the respective digits, counting from 



m 



am 



^, 



\ 



B D 



Fiff. 2. 



or 



„^Qll 



a 



73 



5 



M 



on 



IV 



t^ 



^. 



/70Q 



1 1/ 



within outwards (fig. 2, i). In all the Tubinaresf, so far as 

 I have seen, except Pelecanoides (where the hallux is- quite 



"Otidinaj" (Tentamen, p. 128). A skull extracted from a skin of Ca- 

 lodromas in my possession shows, however, that it, at least, is un- 

 doubtedly a Tinamou, the palate being perfectly " dromseognathous." 



* The Diomedeince, often described as three-toed, have a very minute 

 and rudimentary hallux {cf. P. Z. S. June 1882). 



t Cf. Coues " On the Osteology of Colymbus torqiiatus '' (Mem. Bost. 

 Soc. Nat. Hist. i. p. 161, note). 



