300 Catalogue of Birds. 



Fam. COLYMBIDJE. 



315. Colymbus torquatus, Brunn. Northern Diver. 



316. " arctious, Linn. Black-throated Diver. 



317. " septentrionalis,IA\m. Red-throated Diver. 



318. Podiceps griseigena (Bodd.). Red-necked Grebe. 



319. " cristatus (Linn.). Crested Grebe. 



320. " cornutus (Gm.). Horned Grebe. 



321. Podilymbus podiceps (Linn.). Carolina Grebe. 



Fam. ALCID^E. 



322. Utamania torda (Linn.). Razor-billed Auk. 



323. Mormon arcticus (Linn). Arctic Puffin. 



324. TJria grylle (Linn.). Black Guillemot. 



325. " lomvia, Brunn. Foolish Guillemot. 



326. « arm, Pallas. Thick-billed Guillemot. 



327. Mergulus alle (Linn.). Sea Dove. 



EXPLANATION OF PLATE III. 



Illustrating Art. XIII. and XIV. Ann. Lye. VIII. pp. 140-143. 

 By Thf,o. Gill. 



Fig. 1. Represents Plagiotremus spilistius Gill (Ann. Lye. 

 viii. 140), of natural size, with open mouth to show the large 

 canine teeth which are received, when the mouth is closed, in 

 corresponding fossae of the palate. 



Fig. 2. The head of the same from below, to show the trans- 

 verse anterior margin of the mouth, the teeth, and the four 

 minute barbels of the chin. 



Fig. 3. Represents Chamopsis ocellatus Poey (Ann. Lye. 

 viii. 143), slightly reduced, and with open mouth exposing to 

 view the tongue. Below the head, a single tooth is repre- 

 sented. 



