542 PHOCA. MONACHUS. 



richardi geronimensis Allen, Bull. Am. Mus. Nat. Hist., 1902, p. 495. 

 SAN GERONIMO HAIR SEAL. 



Type locality. San Geronimo Island, Lower California, Mexico, 

 to Santa Barbara Island, California. 



Geogr. Distr. Southern portion of the North Pacific Ocean; 

 range unknown. 



Genl. Char. Like P. richardi, but larger and with heavier denti- 

 tion. 



Color. Like P. richardi. 



Measurements. Skull: basal length, 225; zygomatic breadth, 134; 

 mastoid breadth, 131; palatal length, 95; width between molars, 46; 

 interorbital constriction, 15; length of nasals, 57; greatest width of 

 braincase, 96 ; upper tooth row, 43 ; lower tooth row, 44. 



Two species only are known belonging to the next genus, one, 

 the West Indian Seal, of the islands in the Gulf of Mexico and the 

 Bahamas, and the other an inhabitant of the Mediterranean and adja- 

 cent portions of the Atlantic Ocean. Formerly the West Indian 

 Seal was found in many of the islands contained within the range of 

 its distribution, but the same cause that has reduced the number of 

 others of its relatives, who were dwellers of the sea, has also left but 

 a comparatively few individuals to represent the species in our 

 tropical waters, and it is probable that in a comparatively few years 

 it will have entirely disappeared. 



1O6. Monachus. 



J 2-2. pl^l. p 4^. M *-' ~ ? 



l- 2 _ 2 > ^ I _ I ' r - 4 - 4 > M -I-I 3 2 - 



Monachus Flem., Phil. Zool., n, 1822, p. 187. Type Phocamona- 



chus Hermann. 

 Pelagios F. Cuv. Mem. Mus. Hist. Nat. Paris, xi, 1824, p. 193, pi. 



13, fig. 2, Id. Diet. Scien. Nat., xxxix, 1826, pp. 549-550. 

 Pelagocyon Glog., Hand, u Hilfsb. Naturgesch., 1841, pp. xxxiv, 



163. 



Rigoon, Gistel, Naturg. Thiere., 1848, p. x. 

 Heliophoca Gray, Ann. Mag. Nat. Hist., 2d Ser., xm, 1854, p. 201. 



Muzzle elongate, depressed; nasals short; well developed nails 

 on anterior digits, rudimentary on posterior; pelage short, stiff; 

 palms and soles naked. Canines large: molars conical, lobes imper- 

 fect; the three posterior molars two-rooted. Incisors notched trans- 

 versely interiorly. 



