78 U.S. NATIONAL MUSEUM BULLETIN 260 



obliquely truncated posteroventral margin of the third pleonal 

 epimeron. 



HoLOTYPE. — AHF No. 6028, male, 6.8 mm. Unique. 



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

 1748 m, Dec. 31, 1960. 



Kemarks. — The differences between the two subspecies are of much 

 less magnitude than between full species of the genus. The typical 

 subspecies was recorded from the Tasman Sea in a depth of 3580 m. 



Schisturella totorami, new species 



Figures 36, 37 



Diagnosis. — Lateral cephalic lobes narrow, subacute apically ; eyes 

 absent; epistome of medium depth, flat, labral process of medium 

 length, projecting strongly in front of epistome; mandibular molar 

 strongly projecting, almost conical, setulose but with small triturate 

 area, better developed on left molar than on right; lower lip with 

 blunt setulose apices ; coxa 1 about 67 percent as long as coxa 2, thus 

 coxa 1 long for the genus, subconical, anteriorly concave; article 2 

 of gnathopod 1 slightly longer than coxa 1, article 6 shorter than 5, 

 slender, palm slightly oblique, tending to be transverse, dactyl with 

 small accessory tooth and setule, article 5 truncate posteriorly, un- 

 lobed; gnathopod 2 slender but not shortened, hand moderately ex- 

 panded, rectangular, palm forming slight chela, dactyl of medium 

 size, fitting palm, inserted mediodistally on article 6 ; pereopods 1 and 

 2 lacking any posterodistal spine near dactyl; pleonal epimeron 1 

 with large hooked cusp at anteroventral corner in male, not hooked 

 in females and juveniles ; posterior corner rounded-quadrate, epimeron 

 2 with subquadrate but slightly projecting posteroventral corner, epi- 

 meron 3 with short, broad posteroventral tooth, longer in female than 

 in male ; dorsum of pleonite 4 with hump in male but flat in female ; 

 inner ramus of uropod 2 with deep constriction; telson cleft about 

 halfway. 



Holotyte.— USMN No. 113226, male, 5.9 mm. 



Type-locality.— USMN Ace. No. 247045, Santa Monica Bay, 

 Calif., hagfish trap, 183 m (5), Feb. 18-19, 1963, coll. T. R. Folsom. 



Relationship. — This species resembles /Schisturella zopa J. L. 

 Barnard (1966a) from California but differs in the more strongly 

 trapezoidal and anteriorly extended coxa 1, in the presence of a pro- 

 truding subacute angle on the posteroventral corner of pleonal epi- 

 meron 2, the presence of a strong hook on the anteroventral corner 

 of epimeron 1, the weaker tooth of pleonal epimeron 3 and the oblique 



