76 



U.S. NATIONAL MUSEUM BULLETIN 2 60 



small accessory tooth and setule, article 5 truncate posteriorly, unlobed ; 

 gnathopod 2 slender but not shortened, hand narrow, rectangular, 

 palm forming slight finger, dactyl of medium size, fitting palm, inserted 

 mediodistally on article 6 ; pereopods 1 and 2 lacking distinctive pos- 

 terodistal spine on article 6, pereopods 3-5 without special diagnostic 

 features, and 4 and 5 broken at fifth articles ; pleonal epimeron 1 with 

 rounded anteroventral corner, posterior corner rounded-quadrate, 

 epimeron 2 with subquadrate posterior corner, epimeron 3 with large 

 posterior plate terminating in obliquely and dorsally directed tooth 

 below which posterior margin distinct from ventral margin ; dorsum 

 of pleonite 4 straight, bearing two setae; inner ramus of uropod 2 

 with deep constriction ; telson cleft slightly less than halfway. 



Figure 34. — Schisturella grahenis, new species, male, 5.0 mm, 7229: a,h, mandibles; c, lower 

 lip; d, maxilla 1; e, aberrant right maxilla 2,/, maxilliped; g, palp article 4 of maxilliped; 

 h, normal left maxilla 2; i, outer lobe of maxilla 1. 



HoLOTYPE. — AHF No. 6021, female, 5.0 mm. 



Type-locality.— Station 7229, 27°54'25" N, 115°40'00" W, 1720- 

 1748 m, Dec. 31, 1960. 



Material. — Sixteen specimens from the type-locality. 



Remarks. — Gills of pereopods 3 and 4 have a small accessory lobe ; 

 the gill of pereopod 5 is very small. 



Relationship. — This species comes closest to Schisturella adversi- 

 cola (K. H. Barnard, 1925) from the south Atlantic Ocean but differs 

 by the longer, thinner lobe of the upper lip, by the larger tooth of 

 the third pleonal epimeron, the slightly deeper cleft of the telson and 



