142 



RATHBUN 



first to fourth segments of the abdomen have a median carina, usually 

 sharp and high on the first three segments but not extending the full 

 length of each segment. 



Dimensions.— Female, length 66.5 mm., length of carapace 17.7 mm. 

 Male, length 44.3 mm., length of carapace 11.2 mm. 



Distribution.— From Bering Sea, near the Pribilof Islands, to Oregon, 

 including Puget Sound, 24-121 fathoms. Taken by the Albatross at 38 

 stations. 



Also collected by W. H. Dall at the following locahties : 



Iliuliuk, Unalaska, 3-6 fathoms; Captains Bay, Unalaska; Shahafka 

 Cove, Kadiak. 



NECTOCRANGON CRASSA Rathbun. 



Nectocrangon crassa Rathbun, The Fur Seals and Fur-Seal Islands of the 

 North Pacific Ocean, Pt. Ill, 556, 1899. 



Female. — Body stout. 



Carapace more than one third the length of the abdomen; three 

 strong equidistant spines on the median carina ; between the first of these 

 spines and the 

 spine on the ante- 

 rior margin there 

 is a small tooth 

 or spinule. Lat- 

 eral carina well marked. Antennal 

 spine not reaching the antennal scale. 

 Spine of scale extending well beyond 



the blade. Fig. 84. Nectocrangon crassa. ? (Xif). Sta- 



tion 3245. a. Dorsal view of carapace and ab- 



The hand of the first pair of feet is ^omen. b. side view, 

 a little more than three times as long as wide ; its anterior margin is longi- 

 tudinally oblique; the spine is short and stout. Sternal crest of male 

 armed with spines. 



Abdomen slighdy sculptured ; first to fifth segments furnished with a 

 blunt median carina; sixth and seventh segments having 

 two carinae, those of the sixth segment converging and 

 disappearing toward the posterior margin ; this margin has 

 Fig. 85. Nee a large lobe at the supero-lateral angles ; the fourth, fifth, 



tocraiigon crassa. i «j j 



« (X if), sta- and sixth segments have a small tooth or spine at infero- 



tion 3245. a. Aci- . 



cie. b. Chela, posterior angles. 



jl/a/<r. — Smaller and more slender than female; abdominal carinse 

 stronger. 



Dimensions.— Yevcid\e,\exig\}sx 48.5 mm., length of carapace 13 mm. 



