AMPHIPODS 241 



Family AMPHITHOID^E. 

 AMPHITHCE HUMERALIS Stimpson. 

 Two specimens from Puget Sound, the type locality. 

 A specimen of another species of Amphithoe was taken along with the 

 preceding specimens. It is perhaps of the same species as that described 

 by Caiman as Amphithx sp., 1 although it does not quite agree with 

 Caiman's description. As the specimen is a female, it can not be identi- 

 fied with certainty. 



ERICHTHONIUS DIFFORMIS Milne Edwards. 

 Several specimens collected at Puget Sound by Professor Kincaid. 



Tribe Caprellidea. 

 CAPRELLA CILIATA Sars. 

 Two specimens from Orca, Prince William Sound, Alaska. 



CAPRELLA IRREGULARIS Mayer. 

 Several specimens from Orca, Alaska, from among Thuiaria turgida. 



CAPRELLA KENNERLYI Stimpson. 



Several specimens from Popof Bay, Yakutat, Dutch Harbor, and 

 Kadiak Harbor, Alaska. 



CAPRELLA ALASKENSIS sp. nov. 



Type from Orca, Prince William Sound, Alaska (a single male). 



Anterior portion of the body much elongated. Head with a blunt 

 spine or tubercle over the eye. First antennae stout, the first joint of the 

 flagellum about two thirds the length of the second, which is only a little 

 longer than the third ; flagellum about the length of the preceding joint 

 of the peduncle and composed of eleven segments. Second antennas 

 slender, not reaching the base of the last joint of the peduncle of the 

 first pair, the posterior margin fringed with long hairs; flagellum two- 

 jointed and nearly as long as the preceding joint of the peduncle. First 

 segment of the thorax about three times as long as deep ; second segment 

 tumid posteriorly but narrowed and produced in front of the gnathopods ; 

 third and fourth segments with a pair of tubercles near the middle and 

 a larger pair at the posterior end of the dorsal side, the tubercles of the 

 third segment much less prominent than those of the fourth ; fifth seg- 

 lAnn. N. Y. Acad. Sci., XI, p. 273, 1898. 



