ISOPODS OF NORTH AMERICA. 



453 



a little longer than the fifth; the flagellum is much longer than the 

 body, and is composed of about one hundred joints. 



The first thoracic segment is wider than the head; the lateral mar- 

 gins are straight, entire. The second and third segments have the 

 lateral margins excavate, the anterior and posterior angles produced, 

 with the epimeron situated in the excavation. The fourth segment 

 has the anterior angle produced, the epimeron being situated in the 

 excavation of the entire posterior part of the segment. The fifth, 

 sixth, and seventh segments have the lateral margins entire, the 

 epimeron showing at the posterior part of the segment. 



FIG. 505. CARPIAS BERMTDENSIS. a, MANDIBLE, x 58. ft, SECOND MAXILLA, x 58. e, FIRST LEG OP 

 MALE, x 30J. d, DORSAL VIEW OF MALE, x 18g. e, MAXILLIPED. x 58. /, FIRST MAXILLA, x 58. 



The terminal segment of the body is about as broad as long, the 

 entire margin smooth, with a small rounded lobe between the basal 

 joints of the uropoda. 



The uropoda are very long, much longer than the abdominal seg- 

 ment. The basal joint is about two-thirds the length of the abdominal 

 segment, and is narrower at the base than at the apex. The two 

 branches are of nearly equal length, the outer one being slightly 

 shorter, and they are longer than the basal joint. 



The first pair of legs in the male are remarkably long, being one 

 and two-thirds times the length of the body, and are prehensile. The 

 basis is as long as the width of the first thoracic segment, and has the 



