30 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL.18 



Coxa 1 : lower posterior corner with a strong tooth, coxae 2 and 3 

 without tooth. 



Gnathopod 1 moderately slender; article 6 about two thirds as long 

 as 5, article 7 about one half as long as 6. 



Gnathopod 2: article 6 about one half as long as 5, article 7 one half 

 as long as 6. 



Peraeopod 1 : article 4, anterior distal angle produced ; article 7 

 longer than 5 and 6 combined. 



Peraeopod 2 similar to 1 but with generic differences. 



Peraeopod 3 : posterior edge of article 5 with 4 sets of spines, anterior 

 edge lined with moderately strong setae; article 6, posterior edge with 

 6 setal spines. 



Peraeopod 4: posterior edge of article 5 with 3 sets of spines, poste- 

 rior edge of article 6 with 3 setal spines. 



Peraeopod 5 : posterior lobe of article 2 nearly truncate below, reach- 

 ing almost to junction between articles 4 and 5 ; article 4 with a small, 

 posterior, setose lobe ; article 4 longer than 3 ; article 6 broadly expanded ; 

 article 7 as long as article 5. 



Uropod 1 reaching to end of uropod 2 ; peduncle slightly longer than 

 rami ; both edges of inner ramus and outer edge of outer ramus spinulate. 



Uropod 2: peduncle slightly longer than rami; both edges of inner 

 ramus and upper edge of outer ramus spinulate; outer ramus with a 

 strong spine at apex. 



Uropod 3: rami broad, lanceolate, subequal, both edges of outer 

 ramus and outer edge of inner ramus setose. 



Telson: lobes moderately slender; apex of lobe notched laterally, 

 containing 3 or 4 setae ; upper surface of each lobe with 3 to 5 setae. 



Pleon segment 3: posterior edge convex, lower posterior angle with 

 a small tooth, dorsal surface of segment raised into 2 very strong lateral 

 ridges. 



Pleon segment 4 : dorsal surface with a thin keel, the dorsal surface 

 of which is strongly incised. 



Pleon segment 6 : lateral ridges strongly developed. 

 Male: Unknown. 



Types: Holotype, AHF no. 4914, female, 14.5 mm; paratype, fe- 

 male, 14 mm. 



Type locality: Station 1714-49, 2 miles east of Entrada Point, Mag- 

 dalena Bay, Lower California, 17 to 18 fms. 



Material examined: Stations 221-34 (3), 259-34 (4), 268-34 (2), 

 280-34 (2), 284-34 (2), 285-34 (2), 456-35 (2), 458-35 (1), 478-35 



