74 



BULLETIN- 2 01, UNITED STATES NATIONAL MUSEUM 



beyond the base of the eyestalks ; eyes of moderate size, pigment black. 

 Antennal scale (fig. 18, a) extending as far forward as the distal 

 end of the antennular peduncle, four times as long as broad, terminal 

 lobe rather broader than long, extending beyond the distal spine of 

 the outer margin, apex of the lobe marked off by a distinct suture. 



Figure 19. — Siriella roosevelti Tattersall: a, Third pleopod of male, X 85; b, fourth pleopod 



of male, X 85. 



Endopods of the third to the eighth thoracic limbs (fig. 18, b), with 

 the carapace distinct and the propodus undivided, the carpus rather 

 less than one-third of the whole propodus. 



Both rami of the third pleopods (fig. 19, a) of the male with two 

 modified setae at the distal end, the outer seta is stout and smooth, 

 the inner seta slightly more slender than the outer and plumose at 

 the distal end. 



