ISOPODA. 25 



that segment in E. a/mericana and R. maculata. A more tangible distinction appears 

 to lie in the proportions of the uropods, which in both the species last mentioned are 

 said to have the inner branch a little longer and broader than the outer, while in the 

 present species it is described as much longer and a little broader. Probably it was 

 not the absolute length of each branch that was taken into comparison, but the inner 

 branch was reckoned the longer by all that part of it which extended beyond 

 the outer branch. It will be seen by the figures here given, that, if the specific 

 determination is correct, the telsonic segment is subject to some variation, the apical 

 margin passing from the subtriangular to a rather broadly rounded contour. In 

 either case the margin is minutely serrate and fringed with minute spines and short 

 plumose setae. The uropods have the margins a little more strongly serrate and the 

 armature rather stronger. Their peduncle is greatly produced at the inner apex, and 

 the long process is rather strongly fringed with setae. 



In the first antennae the flagellum is six-jointed, but in the smaller and perhaps 

 not fully adult specimen five-jointed. The second antennae have a long spine on the 

 apex of the fourth joint of the peduncle, the flagellum in the male specimen with 

 fourteen joints on one antenna and fifteen on the other, many of the joints fringed 

 with setules. In the smaller specimen the flagella were twelve- and thirteen-jointed. 



In the mandibles the first joint of the palp is the longest. The terminal joint of 

 the maxillipeds has two outward curving apical spines, and a similar spine below the 

 apex (this, however, not being clearly discerned in the male specimen). 



The fingers of the prehensile legs are strongly hooked. The ambulatory legs have 

 the third joint very elongate, esjaecially in the last pair. 



The first pleopods have both branches narrow, fringed with setae, except on much 

 of the outer border of the inner branch. The second pleopods have the outer 

 branch longer and much broader than the inner. In both the margin is somewhat 

 irregular and much of it fringed. The male appendix does not reach the end of the 

 inner branch. 



Length of largest specimen, male, 13 millims., with a breadth of 7 millims. The 

 smaller specimen figured was 11 "3 millims. long by 5 millims. broad. A specimen 

 laden with eggs was 12 millims. long, 5 '7 5 millims. broad. 



Localities: Station I., off Negombo, 20 fathoms; Station II., off Uluwitti, 

 8 fathoms ; Station V., Chilaw Paar, 10 fathoms ; on weed bearing oyster spat, S. E. 

 of Modragam Paar. 



Family: CYMOTHOIDiE. 



Anilocra, Leach. 



1818, Anilocra, Leach, 'Diet. Sci. Nat.,' vol. 12, pp. 348, 350. 



1900, Anilocra, Stebbing, in Willey's 'Zoological Results,' pt. 5, p. 639. 



1901, Anilocra, H. Richardson, 'Proc. U.S. Mus.,' vol. 23, p. 528. 



1902, Anilocra, H. F. Moore, 'Bull. U.S. Fish Comm.,' vol. 20 (for 1900), pt. 2, p. 172. 



E 



