DECAPODS 163 
Distribution.—From Atka, Aleutians, eastward and southward to 
Puget Sound; to a depth of 19 fathoms. 
HAPALOGASTER GREBNITZKII Schalfeew. 
Harriman Expedition.— Dutch Harbor, Unalaska (W. R. Coe); Popof 
Island; Orca (T. Kincaid); Sitka (W. R. Coe), extending the known 
range. 
Distribution.—¥rom Bering Sea off the Pribilofs and Cape Newenham 
southward along the Aleutian Islands to Sitka, Alaska; Bering Island. 
Genus Dermaturus Brandt. 
DERMATURUS MANDTII Brandt. 
Harriman Expedition.— Dutch Harbor, Unalaska; Popof Island; Sitka. 
Distribution.—Pribilof Islands; Aleutian Islands and Alaska Peninsula 
to Sitka; Bering Island; 6 to 40 fathoms. 
Genus dignathus Benedict. 
CEDIGNATHUS INERMIS (Stimpson). 
Hapalogaster inermis STIMPSON, Ann. Lyc. Nat. Hist. N. Y., vi, 243, 1860. 
Hapalogaster Brandti SCHALFEEW, Mel. biol., XII, 330, 1892, figs. 1 and 5b, 
of the Bull. Acad. imp. sci. St. Pétersbourg, XXXv, 336, 1892. 
Cdignathus gilli BENEDICT, Proc. U. S. Nat. Mus., Xv, 487, 1894. 
G@dignathus inermis HOLMES, Occas. Papers Calif. Acad. Sci., VII, 119, 1900, 
and synonymy. 
Gdignathus Brandti HOLMES, of. cit., 118, and synonymy. 
I think there is little doubt that Schalfeew’s species is identical with 
Stimpson’s. That the number of squame on the carapace is variable 
is evidenced in the small series I have examined. Stimpson’s type was 
smaller than any examples in the National Museum. 
Distribution.— Unalaska to Pacific Grove, California. 
Genus Acantholithodes Holmes. 
ACANTHOLITHODES HISPIDUS (Stimpson). 
Distribution.—Vancouver Island, British Columbia, to Monterey, Cali- 
fornia. To a depth of at least 16 fathoms. 
Genus Placetron Schalfeew. 
PLACETRON WOSNESSENSKII Schalfeew. 
Plate vi, fig. x. 
Placetron Wosnessenskii SCHALFEEW, Mel. biol., XIII, 333, 1892, fig. 6, of the 
Bull. Acad. imp. sci. St. Pétersbourg, XXXV, 339, 1892. 
Lepeopus forcipatus BENEDICT, Proc. U.S. Nat. Mus., xvu1, 488, 1894. 
