NE W DEC A POD Cli VSTA CEA NS—IIA TUB UN. 893 
Ti/j>c locality. — Aduiiralt}^ Inlet, Puget Sound, 40 fathoms; station 
2865, U. S. Fish Commission steamer Allx(tro-'<s (Cat. No. 25250). 
DlatrlhiLtlon. — Occurs sparino'ly from Aleutian Islands to Puget 
Sound, in 10 to GS fathoms. 
Family HIPPOLYTID^FI 
Genus SPIRONTOC ARIS. 
a. Species haviiuj one or more Hupraorhital spines. 
SPIRONTOCARIS ARCUATA. 
Ver}^ closel}' allied to, and in part associated Avith, S. spina (Sow- 
erb}'^). In the adult female, the upper line of carapace and rostrum in 
profile forms a single curve, without the sinus shown in S. sjjina; 
posterior lobe of third abdominal somite shorter and ])roader than in 
that species, sixth segment considerably shorter, less than one and a 
half times as long as wide; dactyli of third to fifth pairs of feet shorter 
than in *S'. .yji/ia, that of last pair being contained at least three times 
in propodus. 
Dimensions. — Female, length 53.8 nun., length of carapace and 
rostrum 20 nmi., of rostrum 8 mm. 
Type locality. — Washington Sound, Straits of Fuca, 48 fathoms; 
station 2864, U. S. Fish Commission steamer yf//y<:/?'rfAs%s' (Cat. No. 25257). 
Distribution. — From Bering Sea to Straits of Fuca, in 3 to 350 
fathoms. 
SPIRONTOCARIS MURDOCHI. 
Hippolyle spinas Murdoch, Report Interiiat. Polar Exped. to Point Barrow, 
Alaska, 1885, p. 140 (not Cancer spinus Sowerby). 
Allied to /S". spina (Sowerb\') and S. liljehorgii (Danielssen). De- 
scription of female: Rostrum three-fourths as long as remainder of 
carapace, not reaching tip of antennal scale; midrib nearly horizontal; 
upper limb convex, 20 to 22 small irregular teeth; lower limb deeper, 
convex, 1 to 4 small teeth near end. E3^es as wide as the antennular 
peduncle and half its scale. Spine of antennal scale advanced about 
as far as blade. Dactyli of last three pairs of feet long and slender, 
that of last pair half* as long as propodus. Abdomen not carinate; 
sixth segment three-fourths as broad as long. 
Dimensions. — Female, length 46.6 mm., length of carapace and 
rostrum 17 mm., of rostrum 7.5 mm. 
Ty2>c locality. — Oflf Robben Island, east coast of Saghalin, Okhotsk 
Sea, station 3650, U. S. Fish Commission steamer Albatross (Cat. 
No. 25258). 
Distrihut'um. — Also taken on the east coast of Kamchatka and Arctic 
coast of Alaska. 
