HALICHOERUS. PHOCA. 301 



Sub. Fam. II. Phocinae. 



90. Halichoerus. 



I. 31::'; c. I^; P. *-=^; M. i=i = 34. 

 2—2' I — i' 4—4 I— I 



Halichoerus. Nills, Faun. Skand. 1820, i, p. 377. Type Phoca 



grypus. Fabr. 



Piisa. Gill, (nee Scopoli. 1777), Johns. New. Univ. Cycl., 1877, 

 III. p. 1226. 



Molars, excepting occasionally the two hinder in lower jaw, with- 

 out accessory cusps; all one-rooted except last two above and last 

 one below. Muzzle broad; superior outline of skull much arched; 

 facial portion broad, nearly half as long as skull; brain case small; 

 orbital fossae large; sagittal and occipital crests very greatly developed 

 in old males. 



530. grypus. [Phoca), Fabr. Skriv. af Nurturh.-Selsk., i, 2, 1791, 



pi. xiii, fig. 4. 

 Geogr. Distr. North Atlantic from Nova Scotia to Greenland. 

 Genl. Char. Those of the genus. 



Color. Silver ash or dusky gray, spotted obscurely with blackish; 

 color varies from uniform silvery to blackish. Bristles, large, stiff. 



Measurements. Total length adult male, 2440-2745 ; female, 

 1 980-2 1 35. 



91. Phoca. 



I. i=^\ C. i=J; P. ^; M. '=i = 34- 



2-2' I— i' 4-4' I— I -"^ 



Phoca. Linn. Syst. Nat., 1758, i, p. 37. Type P. vitulina. 



Ptisa. Scop. Intr. Hist. Hat., 1777, p. 490. 



Calocephalus. F. Cuv. Diet. Scien. Nat. 1826, xxxix, p. 544. 



Pagophilus. Gray, Zool. Erebus and Terror, 1844, p. 3. 



Pagomys. Gray, Proc. Zool. Soc, 1864, p. 2S. 



Erigtiathus. Gill, Proc. Essex Inst., 1865, p. 5. 



Haliphilus. Gray, Ann. and Mag. Nat. Hist., i866, xvii, p. 446. 



Histriophoca. Gill, Am. Nat., 1873, vii, p. 179. 



Incisors simple, conical; molars, excepting the anterior one, two- 

 rooted, and generally trilobed, and with accessory cusps; all feet 

 with five strong compressed slightly curved claws; first and second 

 digits on fore feet subequal. Facial portion of skull narrow, length- 

 ened; interorbital constriction considerable. 



A. Erignathns. 

 Muzzle broad, cranium at anterior border of frontals very high; 

 palate very broad, arched, outline elliptical; narial fosss deep. Teeth 

 small, weak; molars separate, some deciduous in old adults. 



