Genus— C 0 R V U S . 
CoEVUS Linne, Syst. Nat., 10th ed., p. 105, 
Jan. 1st, 1758. Type (by tautonymy) .. Gorvus corax Linne. 
Gmne Kaiip, Skizz. Entwick-Gesch. Nat. 
Syst., p. 99, (pref. April) 1829. Type (by 
tautonymy) .. .. .. .. .. Gormis cor one Linn6. 
Pterocomx Kaup, Joum. fiir Orn., 1854, p. lv. 
Tjt® (by nionotypy) .. .. .. Gorvus scapulatus Daudin 
' =G. dU)Us. 
Laegest Passeriform birds, with long stout bills, long wings, long tail and 
long stout legs and feet. 
The bill is longer than the head, the culmen arched, tip sharp, moderately 
laterally compressed with little basal expansion, so that the depth at the base 
is about equal to the width; culmen semi-keeled ; the under mandible nearly 
as stout as the upper, interramal space large, triangular, scantily feathered, 
the gonys less than half the length of the bill, a little ascending, not angulate ; 
rictal bristles prominent, nasal bristles long and thick, entirely covering the 
nostrils which are almost circular apertures in deep nasal groove, about one- 
third the length of the culmen. 
The wing has the third primary longest, the fourth and fifth a little 
shorter, the sixth shorter than the second, which is shorter than the fifth; 
the first primary a little more than half the length of the third and about 
equal to the secondaries. 
The tail is long and rounded. 
The feet are long and strong, the front of the tarsus strongly scutate, the 
bind portion bilaminate; the toes long and stout, the outer about equal to 
the inner, the inner toe and claw equal to the middle toe alone, the hind-toe 
longest and stoutest, the claws short, the hind-claw longest and stoutest. 
