104 PROCEEDINGS : BOSTON SOCIETY NATURAL HISTORY. 
The principle on which this change is made is still under discussion 
(see Allen, Bull. Amer. mus. nat. hist., xvi, p. 159, July 1, 1902, 
and Thomas, Proc. biol. soc. Washington, xv, p. 54, June 10, 1902, 
and p. 197-198, October 10, 1902). 
Genus PHOCA Linnaeus. 
Phoca largha Pallas, p. 194. According to Allen (Bull. Amer. 
mus. nat. hist., xvi, p. 463-464) it is impossible to determine what 
animal was originally described under this name. The American 
seals of late currently known as Plioca largha are now divided into 
four forms: 
201. Phoca ochotensis macrodens Allen. 
1902. Phoca ochotensis macrodens Allen, Bull. Amer. mus. 
nat. hist., xvi, p. 483. December 12, 1902. 
Type locality.— Avatcha Bay, Kamchatka. Range extends 
eastward to Point Barrow, Alaska. 
202. Phoca richardii (Gray). 
1864. Halicyon richardii Gray, Proc. zool. soc. London, 1864, 
p. 28. 
1902. Phoca richardii Allen, Bull. Amer. mus. nat. hist., 
xvi, p. 491. December 12, 1902. 
Type locality.— Vancouver Island, British Columbia, Canada. 
203. Phoca richardii geronimensis Allen. 
1902. Phoca richardii geronimensis Allen, Bull. Amer. mus. 
nat. hist., xvi, p. 495. December 12, 1902. 
Type locality. — San. Geronimo Island, Lower California, 
Mexico. 
204. Phoca richardii pribilofensis Allen. 
1902. Phoca richardii pribilofensis Allen, Bull. Amer. mus. 
nat. hist., xvi, p. 495. December 12, 1902. 
Type locality. — Pribilof Islands, Bering Sea. 
