10 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL.18 



Coxae 1 to 3 : lower posterior angle slit. 



Peraeopod 1 : article 7 about as long as articles 5 and 6 combined ; 

 distal anterior angle of article 4 slightly produced. 



Peraeopod 2 : similar to 1 but with generic differences. Side plate 4 

 narrow in holotype, sides parallel, bottom edge rounded; in some of 

 the other specimens at hand, the side plate is very wide with a rounded 

 lower edge. The remaining specimens, intermediate in size between the 

 two above-mentioned forms, have intergrading conditions. 



Peraeopod 3 very short and stout; article 5 short, posterior distal 

 edge strongly produced, posterior edge with 3 spines; article 6 longer 

 than 5, posterior edge with 3 spines. 



Peraeopod 4 shorter and stouter than 3 ; article 5 similar to peraeo- 

 pod 3 but article 6 shorter than in the previous appendage and with 2 

 spines on posterior edge. Anterior edge of article 7 of both peraeopods 

 3 and 4 with a single large tooth. 



Peraeopod 5: lower edge of posterior lobe of article 2 obliquely 

 rounded, reaching only to end of article 3 ; article 4 much shorter than 

 3, article 5 slightly longer than 4, article 6 longer than 5, article 7 

 short, about as long as 5. 



Uropod 1 reaching slightly beyond end of uropod 2; rami subequal 

 in length, shorter than peduncle; inner edge of each ramus spinulate. 



Uropod 2: rami shorter than peduncle, inner edge of inner ramus 

 spinulate, inner edge of outer ramus with 1 spine. 



Uropod 3: outer ramus slender, subequal in length to the inner 

 ramus, which is moderately broad; distal inner edge of inner ramus 

 armed with several very short, broken but evenly worn setae. 



Telson: lobes tapering evenly, apices narrow, truncated, notched, 

 each with 1 or 2 spinules ; dorsal surface of each lobe with 3-4 spinules. 



Pleon segment 3: posterior edge slightly convex, lower posterior 

 corner produced into small tooth. 



Pleon segment 4 : dorsal posterior surface produced upward, forming 

 a subacute mound, rising far above segment 5. In the figured paratype, 

 this character is not quite so strongly developed. 



Pleon segment 6 : lateral ridges acutely produced. 



Male: Unknown. 



Type: Holotype, AHF no. 419, female, 6 mm. 



Type locality: Station 1412-41, 2 miles south of Crook Point, San 

 Miguel Island, California, 41 to 43 fms. 



Material examined: Stations 209-34 (5), 250-34 (1) 259-34 (1) 

 272-34 (1), 461-35 (2), 468-35 (2), 556-36 (1), 563-36 (1), 632-37 



