ISOPODS OF NOKTH AMERICA. 



85 



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

 almost as in C. japonica. 



The segments of the thorax are subequal in length; the first seg- 

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

 fifth segment; the sixth and seven segments are subequal in length and 

 ornamented near the anterior margin with a transverse furrow. The 

 epimera are large, posteriorly produced, and obliquely carinated (the 

 carina terminating in a fork, very wide particularly 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 subactite; the epimera of the seventh pair extend 

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



FIG. 65. ClROLANA SPH^ROMIFORMIS (AFTER HANSEN). O, POSTERIOR PART OF AHDOMEN. ft, LEFT 

 PLEOPOD OF SECOND PAIR. C, LATERAL VIEW OF FEMALE. (1, DORSAL VIEW OF FEMALE. , LEO OF 

 SECOND PAIR. /, LEG OF FIFTH PAIR, g, LEG OF SEVENTH PAIR, h, ANTERIOR PART OF HEAD. 

 (ENLARGED.) 



The first 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 robust; the sixth and 

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

 a little longer. 



The first 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. 



