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. richard. 
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. 
106. Monachus. 
l=; C=; = M.— = 32. 
Monachus Flem., Phil. Zool., 11, 1822, p. 187. Type Phoca mona- 
chus Hermann. 
Pelagios F. Cuv. Mém. Mus. Hist. Nat. Paris, x1, 1824, p. 193, pl. 
13, fig..2, 1d. Dict: Scien, Nat., xxxIx, 1826) pp: 540-556. 
Pelagocyon Glog., Hand. u Hilfsb. Naturgesch., 1841, pp. XXXIV, 
TOs: 
Rigoon, Gistel, Naturg. Thiere., 1848, p. x. 
Heluophoca Gray, Ann. Mag. Nat. Hist., 2d Ser., x11, 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. 
