370. ON THE CLASSIFICATION OF BIRDS. 
gonys very short and angulated. Quills internally | 
emarginated. ‘Tail none. t 4. j 
D. poliocephalus. Ill. of Orn. i. at 13. 
Popoa, Illiger. Bill mo- 337 
derate: the - culmen 
curved towards the tip, 
which is _ notched. 
. Wings moderate,point- 
ed.. Tail remarkably =F 
broad, and rounded. <—=—————_B 
Rasorial. (fig. 337.) 
P. Surinamensis. Pl. Col. 893. 
Cotymsus, Linn. Diver. Bill rather long, straight ; 
the tips acute; the margins inflexed. Nostrils half 
closed by a membrane. Wings short, pointed. Feet 
with four toes, all connected by a palmated mem- 
brane, which is not lobed. The natatorial type. 
C. glacialis. Selby, pl. 76. 
Famiry ALCADZA. Auks.* 
Bill with the culmen more or less arched ; the sides 
compressed. Feet entirely webbed. The ‘hinder toe 
minute, or wanting. | 
Uria, Brisson. Guillemot. Baill moderate, clemibial 
Frontal plumes advancing far upon the nostrils, but 
divided by the culmen. Feet slender, three-toed. 
Tenuirostral. 
Troile. Pl. Enl 903. Brunnichii. Tem. Man. ii. 926. 
Awa, Linn. Auk. Bill compressed and grooved as 
in the last genus, but longer than broad. -Nos-— 
trils placed towards the middle of the bill. Wings 
abortive, fin-shaped. 
| A. impennis. Selby, pl. 82. | an 
Morwon, Illiger. Puffins. Bill short, very high; the 
sides generally sulcated: the culmen strongly arched, é 
* The individuals in this group are so few, that I have not considered it 
expedient to adopt the subgenera particularly as their natural series has 
not been worked out. . 7 a ae 
