AMPHIPODS FROM NORTH AMERICAN WEST COAST — SHOEMAKER 405 



a 



Figure 7. — Syrrhoe longifrons, new species, male: a, anterior end of animal; b, distal end of 

 gnathopod 1; c, posterior margin of second joint of pereopod 3; d, distal end of telson. 



coxal plates somewhat more produced. Second joint of pereopods 

 3-5 more angularly produced behind. The rest of the characters 

 agree rather closely with those of S. crenulata. Length of male from 

 front of head to end of uropods about 10 mm. 



Types.— Male holotype, USNM 94235, and 2 paratypes, USNM 

 107862, taken at Mittelnacht, Vancouver Island, British Columbia, 

 by G. H. Wailes. Specimens from other localities on Vancouver 

 Island are also present m the collections of the U.S. National Museum. 



Remarks. — Although Syrrhoe longifrons resembles S. crenulata, the 

 differences given above are found in all the specimens in the U.S. 

 National Museum (all from Vancouver Island) and appear to be 

 constant. The widespread S. crenulata is a more northern species 

 and occurs in Alaskan waters. 



