DECAPODS 79 
Maxillipeds produced to about middle of antennal scale; first pair of 
feet to end of antennal peduncle; second pair to a little beyond the 
maxillipeds; the last pair of feet to the end of the maxillipeds. 
The abdomen is strongly geniculated or bent at a right angle at the 
third segment, which is posteriorly produced and compressed, forming 
a smooth, rounded carina. The first to fourth segments are without 
spines or spinules; the sixth is more than twice as long as wide, but 
shorter than the seventh, which is narrow and has 4 spinules on each 
side. 
Male.—The thickened portion of the outer antennular flagellum ex- 
tends nearly to the end of the antennal scale. 
This species is very near S. gracilis, from which it differs in the longer 
basal scale of the antennula, in the lower position of the pterygostomian 
spine, in the presence of epipods on the maxilliped and first two pairs of 
Tek, 
Dimensions.— 9, length 54 mm., of carapace and rostrum 20 mm., of 
rostrum 11.5 mm. 
Distribution.—¥From Bering Sea to Drake Bay, California: 
Bering Island, one specimen from stomach of Gadus macrocephalus (N. 
Grebnitzky). 
Alaska, probably Bering Sea (U.S. R. S. Corwin). 
Nazan Bay, Atka (W. H. Dall). 
Albatross stations: 
Off Pribilof Islands, 20 fathoms, station 3438. 
Off Rat Islands, Aleutians, 55 fathoms, station 3599. 
Jliuliuk Harbor, Unalaska, 93 fathoms, station 3335. 
Off North Head, Akutan Island, 72 fathoms, station 2842. 
Off south entrance to Akutan Pass, 45 fathoms, station 2843. 
Unimak Pass, 34 and 50 fathoms, stations 3220, 3222. 
Northwest of Unimak Island, 43 fathoms, station 3262. 
South of Unimak Island, 42 fathoms, station 3217. 
15 miles south of Sannak Islands, 44 fathoms, station 2846. 
Shumagins, 21-58 fathoms, stations 2850 (type locality), 2851, 2852. 
Drake Bay, California, 35 fathoms, station 3155. 
SPIRONTOCARIS AMABILIS (Lenz). 
Hippolyte amabilis LENZ, Zool. Jahrb., Syst., XIV, 432, pl. XXXII, figs. 2, 3, 
1gOl. 
Bare Island, British Columbia (type locality). 
SPIRONTOCARIS DECORA Rathbun. 
Spirontocaris decora RATHBUN, Proc. U.S. Nat. Mus., XXIv, 896, 1902. 
Female.—Carapace crested on its anterior half; rostrum longer than 
the carapace, armed with 4 or 5 teeth above, of which one or two are on 
