TRINGID2E.] OSTEOLOGIA AVIUM. [TrINGINJE. 



Remarks. 



The Order Littores is rather an heterogeneous one, and it is difficult to say where to 

 place the different families and sub-families. It may be objected to the present 

 arrangement that the Otidce are placed in it, not having a hind toe, but in the 

 TinamincB we find the rudiments of one ; thus, as far as this character is concerned, 

 they constitute a transition group from Cursores to Littores. The Chionidce — particu- 

 larly Chionis — is peculiar in the formation of the cranium ; the sternum is not much 

 dissimilar to 0. tetraoc, but the pelvis of O. tetrax comes nearer to that oiAttagis, while 

 the pelvinal form approaches that of the Charadriidce. Tinochorus is closely 

 related to Attagis, In all the Charadriidte there is a great similarity of structure ; 

 the sternum is always furnished with two foramina ; the manubrial process 

 is small and bifid ; the splint bounding the outer foramen does not extend so 

 far backwards as the inner one ; the furculum is always much arched at the junction 

 of the rami, and has generally a rudimentary process at that point. 



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