350 U.S. NATIONAL MUSEUM BULLETIN 236 



somite as in female. All abdominal and thoracic somites distally 

 bordered with fine spinules. On anal somite fine patch of spinules 

 at end of carina running from insertion of anal plate backwards. 



Furcal rami different from those of female, cylindrical, VA times 

 as long as wide, with huge, internal, chitinized swelling at internal 

 margin. 5 marginal setae and 1 appendicular seta; development of 

 these as in female. 



Antennules (figs. lS9f,g) 6-segmented, subchirocerate : 1st seg- 

 ment with two blunt teeth placed in different planes; 2nd segment 

 fairly long; 4th segment strongly swollen, with subapical conical 

 process, carrying aesthetasc and 2 fine setae. In addition, there is a 

 deepened longitudinal groove, into which fit the apical two segments; 

 the proximal end of the groove is marked by a thick tooth, carrying 

 a curiously shaped seta. The apical segment probably results from 

 the fusion of two smaller parts. Setation represented in figure 139/. 



Antenna (fig. 139A) with unsegmented exopodite, carrying 4 setae. 

 Allobasis with single internal seta. Endopodite slender, with 6 

 appendages, 4 of which are marginal setae. External margin of 

 endopodite with 2 small teeth and larger apical spine. 



Mandible reduced; cutting edge of praecoxa with some rounded 

 teeth and globular swelling at internal border. Palp unsegmented, 

 with 3 marginal setae; endopodite absent, exopodite represented by 

 single seta. 



Maxillule (fig. 139i) with squarish arthrite, carrying 5 teeth and 

 basal seta. There is only one endite, apparently the coxal, carrying 

 2 setae. Basipodite and endopodite fused, styliform, with 2 apical 

 setae. Exopodite strongly reduced, represented by 2 setae. 



Maxilla with 5 endites: 2 praecoxal, 2 coxal, and 1 basal. Proximal 

 4 endites rather small, each with 3 setae. Basal endite larger, with 

 slender spine, coalescent with endite, and 2 setae. No trace of 

 endopodite. 



Maxillipede (fig. 139j) of usual type, chelate, coxa with 2 apical 

 internal setae. Internal margin of basis straight, external margin 

 swollen. Endopodite unsegmented, styliform, forming slender digit, 

 slightly longer than basis and curved at apex. 



Leg 1 (fig. 139a) with big coxa and basis; exopodite 2-segmented, 

 endopodite 3-segmented. Coxa with large external, haired swelling. 

 Basis with external seta; endopodite inserting on big socle, internal 

 border of which is haired and carries seta. Two exopodal segments of 

 nearly equal length, 1st without internal setae; 2nd with total of 5 

 appendages. Exopodite reaches % length of 1st endopodal segment; 

 this segment is styliform, 7 times as long as wide, and has strongly 

 haired internal border. 2nd and 3rd endopodal segments fused, with 

 small seta near line of fusion, forming slender digit, of which apex is 

 pointed and slightly curved. 



