DECAPODS 95 



segment of the antennular peduncle. The outer maxilh'peds reach a httle 

 beyond the middle of the antennal scale ; the first pair of feet to the end 

 of the antennal peduncle ; the second pair midway between the maxilli- 

 peds and the tip of the scale ; the fifth pair to the end of the maxillipeds. 



The third segment of the abdomen seen in profile is evenly rounded ; 

 it is laterally slightly compressed ; fourth segment without spines ; the 

 sixth is less than twice as long as the fifth, and also shorter than the 

 seventh, which has 4 or 5 spines on either side. 



Ma/e. — Sma.\\er and more slender. Rostrum longer, sometimes ex- 

 ceeding the scale a trifle, curving upward in terminal half, armed with 5 

 to 7 teeth above, 5 to 9 below. The pterygostomian spine may be 

 obsolete. The thickened portion of the outer flagellum extends to the 

 terminal fifth of the antennal scale. 



Difnensions. — 5 , approximate length 50 mm., length of carapace and 

 rostrum 18.5 mm., of rostrum 10.2 mm. ? , approximate length 34 mm., 

 of carapace and rostrum 16 mm., of rostrum 9.5 mm. 



Distribution. — From Arctic Alaska southward to Kamchatka and 

 Aleutian Islands, and eastward to Port Etches. 



Taken by Dr. Dall in small numbers at Cape Lisburne, 5—7 fathoms ; 

 Cape Etolin, Nunivak, 8 fathoms ; Hagemeister Strait, 8—1 5 fathoms ; 

 Chichagof Harbor, Attn, 5-7 fathoms; Kiska Harbor, 9-12 fathoms; 

 Constantine Harbor, Amchitka, 6-10 fathoms; Bay of Islands, Adak, 

 9-16 fathoms; off station reef, Iliuhuk Harbor, Unalaska, 3 fathoms; 

 Belkofski Bay, 15-25 fathoms; Anchorage, Big Koniuji Island, Shu- 

 magins, 6-20 fathoms; Shahafka Cove, Kadiak; Chugachik Bay, 

 Cook Inlet, 20-60 fathoms ; Port Etches, 5-8 fathoms. 

 Bristol Bay, 14^ fathoms [Albatross station 3236). 

 Kadiak, 5 fathoms (Harriman Expedition, W. R. Coe). 

 Bering Island (L. Stejneger). 



Bering Island, in stomach of Gadus macrocephalus (N. Grebnitzky). 

 Rakovaya Bay, Avacha Bay, Kamchatka (L. Stejneger). 

 Solovarennaja Bay, Petropavlovsk, Kamchatka, 10-12 fathoms, algae 



(N. Grebnitzky). 



SPIRONTOCARIS KINCAIDI Rathbun. 

 Spirontocaris kincaidi Rathbun, Proc. U. S. Nat. Mas., xxiv, 899, 1902. 



Near S. catntschatica. 



Female. — Carapace short in relation to the abdomen. Rostrum one 

 third longer than the carapace, not reaching tip of antennal scale, 

 slightly concave above, horizontal, armed above with 5 (occasionally 6) 

 teeth, two of which are on the carapace, the anterior tooth a little before 

 the middle of the rostrum ; tip acute ; lower hmb, as in all the gaimardii 



