carinat.t;. 



Series A. EUORNITHES. 



No functional teeth ; mandibular rami not anchylosed at sym- 

 physis ; terminal faces of centra of cervical vertebrae saddle-shaped ; 

 distal part of ischium uniting with ilium. 



Suborder I. PASSERES. 



^githoguathous birds, with a long and backwardly directed 

 hallux. The tibio-tarsus has a long, slender, and subcylindrical 

 shaft, of which the distal part is somewhat flattened from before 

 backwards ; the proximal extremity is but slightly enlarged, with 

 a short and prominent cncmial crest ; the distal extremity (fig. 1) 

 is expanded, with long and subequal condyles, a wide and everted 

 intercondylar gorge, marked with a transverse depression for the 

 articular ligament, and the posterior trochlear surface carrying a 

 slight median ridge ; there is no intercondylar tubercle by the 

 extensor bridge. In the humerus there is a well-marked and forked 

 ectepicondylar tuberosity ; the surface for the brachialis anticus is 

 situated on the inner border of the bone (fig. 2) ; there is a minute 

 tubercle on the middle line of the palmar aspect of the distal 

 extremity above the condyles ; the coraco-humeral groove is very 

 slight ; and the subtrochanteric fossa is well-developed. The meta- 

 carpus has an intermetacarpal plate, which anchyloses to the smaller 

 bar. 



Family CORVID.^. 



The humerus has no tricipital fossa. The family includes the 

 largest repi'csentatives of the suborder. 



(Jenus CORVUS, Linn.' 

 The type genus. 



Corbu^ coiny, Linn.- 



The type and largest species. 



Ilab. Palsearctic and Nearctic regions. 



Syst. Nat. ed. 12, vol. i. p. I. 55 (1760). 

 Loc, cit. 



