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 2»^ 

 stations. 



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



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. 9 (X'f)- Sta- 



tue uiauc. jj^^ 3245. a. Dorsal view of carapace and ab- 



The hand of the first pair of feet is '^°"^'="- ^- ^'^^ ^'«^- 

 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 slightly sculptured ; first to fifth segments furnished with a 

 blunt median carina; sixth and seventh segments having 

 two carinse, those of the sixth segment converging and 

 disappearing toward the posterior margin ; this margin has 

 Fig. %s7~ Nee- a large lobe at the supero-lateral angles ; the fourth, fifth, 

 ocrangof^cras^a^^ and sixth segmeuts have a small tooth or spine at infero- 



tion 3245. a. Aci- . , 



cie. b. Chela, postenor auglcs. 



i!/d;/<r.— Smaller and more slender than female; abdominal carince 

 stronger. 



Z>;w^//jw«.y. — Female, length 48.5 mm,, length of carapace 13 mm. 



