228 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 18 



Epistome unproduced. 



Maxillipedal palp article 4 simple. 



Gnathopods 1 and 2 similar, articles 5 and 6 subequal in length, 

 article 6 moderately broad, palm slightly oblique. 



Peraeopod 3 : article 4 nearly as stout as article 2, article 5 notice- 

 ably narrower than 4, article 6 shorter than 5. Ratio of widths of articles 

 2, 4, 5, 6 = 32:30:23:11. 



Peraeopod 4: articles 2 and 4 quite tumid, article 5 rather slender. 

 Ratio of widths of articles 2, 4, 5, 6 = 46:30:17:8. 



Peraeopod 5 : article 2 rather narrow, the ratio of width to length is 

 7:8; article 2 extends down nearly to the end of article 4, its lower edge 

 is slightly convex, sweep point at distal end of article 3; posterior edge 

 with 9-10 small teeth; article 6 much longer than 5, article 7 long. 



Uropod 1 : upper edge of peduncle armed with slender spines, apical 

 one very large; rami as long as peduncle, outer armed with 4 short 

 spines, inner with 2, each apex with an articulated spine. 



Uropod 2: peduncle with about 7 slender marginal spines, outer 

 ramus with about 5 short spines, inner bare, apex of outer with 2 slender 

 spines besides an imbedded spine, inner with one apical spine and an 

 imbedded one. 



Uropod 3 : inner ramus about three fourths as long as outer, article 

 2 of outer ramus long, about four tenths as long as article 1. 



Telson : apices subacute, lateral notches each with a spine and a feath- 

 ered setule, lateral edges each with a fascicle of setae about two thirds 

 the distance from the base. 



Third epimeron: posterior edge straight, setose its full length, lower 

 posterior corner broadly rounded and sweeping down to the lower edge. 



Male. — See Shoemaker 1933. 



Remarks. — The adult female is about 7 mm in length. A juvenile 

 specimen 4 mm in length from Station 461-35 has the inner ramus of 

 uropod 3 much shorter and the eyes relatively smaller than in adult 

 females. - 



Although the uropodal armature of the present specimens does not 

 quite tally with the descriptions of Shoemaker 1933, and the second 

 article of peraeopod 5 is slightly broader with smaller teeth, there Is 

 no hesitation in allying the Pacific specimens with the Atlantic ones. 

 Future close comparison of specimens from both oceans may show sub- 

 speciation. 



Material examined. — 11 specimens at 5 stations. 



