

44 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL.18 



Peraopod 5 similar to that of A. pugetica but stouter; article 6 and 

 the large posterior lobe of article 4 much stouter ; articles 5 and 7 notice- 

 ably shorter than in A. pugetica. Anterior edge of article 5 notched. 



Uropod 1 reaching almost to end of uropod 2; rami shorter than 

 peduncle; both edges of inner ramus and outer edge of outer ramus 

 spinulate. 



Uropod 2: rami shorter than peduncle; both edges of both rami 

 spinulate, apex of outer ramus with a long spine. 



Uropod 3: rami slender, lanceolate, outer more slender than inner; 

 both edges of outer ramus and outer edge of inner ramus setose. 



Telson moderately broad, apices almost truncate, very slightly in- 

 cised, each armed with 3 setules; upper surface of each lobe with 4 or 

 5 setules. 



Pleon segment 3: posterior edge strongly convex, lower posterior 

 angle produced into small tooth. 



Pleon segment 4: posterior dorsal process saddle-shaped, posterior 

 edge vertical. 



Pleon segment 6: lateral processes small. 



Male: Unknown. 



Types: Holotype, AHF no. 406, female, 8 mm ; paratypes, 3 females. 



Type locality: Station 1168-40, 3^2 miles off Newport Beach, Cali- 

 fornia, 34 to 37 fms. 



Material examined: Stations 1160-40 (1), 1168-40 (6), 1194-40 

 (2), 1321-41 (1), 1362-41 (2), 1388-41 (1), 1390-41 (12), 1780- 

 49 (5). Cedros Island, Lower California, May 13, 1946, Kenyon- 

 Williams Expedition (2). 



Remarks: This species is closely related to A. pugetica Stimpson 

 but differs in the longer first uropod, the smaller tooth on pleon seg- 

 ment 3, and the shape of the head. The dorsal process of pleon segment 

 4 is rather shallow, but the specimens at hand are small, corresponding 

 to the small specimens of A. pugetica which also have a shallow process. 



In the figured paratype, the indentation on the lower front edge of 

 the head appears to be exaggerated somewhat. Smaller specimens show 

 the incision to be much shallower. 



This species resembles A. composita Schellenberg (1931) in the 

 form of pleon segment 4 and peraeopod 5, but differs in the presence 

 of eyes, the less strongly produced tooth of pleon segment 3, the more 

 slender rami of uropod 3, the shape of the head, and the apices of the 

 telson. 



