ISOPODS OF NORTH AMERICA. 



85 



The mandibles have a wide ciittino- edge. The maxillipeds are 

 almost as in C. japonica. 



The segments of the thorax arc suhequal in length; the first seg- 

 ment is somewliat shorter than the head and somewhat longer than the 

 Hfth segment; the sixth and seven seg-ments are subequal in length and 

 ornamented near the antei'ior margin with a transverse furrow. The 

 epiniera are large, postei'iorly produced, and oblicpiely carinated (the 

 carina terminating in a fork, very wide particularl}' in the posterior 

 epimera, and very deep, forming an excavation), becoming gradually 

 wider posteriorly and more produced, the carina becoming higher and 

 the posterior angle subacute; the epimera of the seventh pair extend 

 in length as far as the first four segments of the abdomen. 



Fig. 05. — CiROLANA sph-eromiformis (After Hansen), o, Posterior part of abdomen, h. Left 



PLEOPOD of second PAIR. C, LATERAL VIEW OF FEMALE, d, DoRSAL VIEW OF FEMALE, f, LEG OF 

 SECOND PAIR. /, Leg OF FIFTH PAIR. (J, LEG OF SEVENTH PAIR, h, ANTERIOR PART OF HEAD. 



(Enlarged.) 



The tirst three pairs of legs are rather robust, with the second arti- 

 cle elongate, the fourth article very short with the exterior angle reach- 

 ing beyond the apex of the fifth article; the legs of the second and 

 third pairs have the sixth article much wider than in other species, 

 long, about twice as long as wide. 



The last four pairs of legs are short, rather ro])ust; the sixth and 

 seventh pairs of legs are subequal in length, the tifth pair of legs being 

 a little longer. 



The tirst five segments of the abdomen are exposed, are very short 

 and very convex; the fifth segment has the lateral angles not covered 

 by the fourth segment. 



