106 



BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



very much elongated, about two and a half times longer than wide, 

 with the exterior margin thickly furnished with plumose hairs, the 

 middle margin furnished with a few simple hairs, the interioi- margin 

 bare, the apical margin furnished with numerous very long, plumose 

 hairs; the other articles are simple, scarcely dilated, shorter, and fur- 

 nished with very few hairs. The sixth pair of legs differ but little 

 from the fifth pair of legs. 



The tirst live segments of the abdomen and the pleopods have the 

 usual structure. 



The last segment of the abdomen is more than a half wider than 

 long, having in the middle near the base a transverse depression, the 



Fig. 86.— Cirola.n-1. (jKAci^is (.After Hansen), a, Left pleopod of second pair, b. Leg of 



SECOND PAIR. C, LEG OF SEVENTH PAIR, (l, LEG OF FIFTH PAIR, f, ANTERIOR PART OF HEAD. 



/, Lateral view of male, g, Dorsal view of adult male, h, Posterior part of abdomen. 

 (Enlarged.) 



margins posteriorly being obliquely truncate and ornamented with 

 about eight spines and long hairs, the apex acute. 



The uropoda are rather short; the inner branch is scarcely twice as 

 long as wide, extending somewhat beyond the abdomen, being a little 

 longer than the exterior branch and much narrower, with the poste- 

 rior margin much shorter than the anterior margin, the apex scarcely 

 acute; both branches are furnished with a few small spines and hairs, 

 mostly long, and longer than in the preceding species (C. neglecta); 

 the peduncle has the inner angle strongly produced, extending a long 

 distance beyond the middle of the inner branch. 



The color of an old specimen is yellowish brown. 



