TSOTODS OF NORTH AMERICA. 



453 



a little lono-or than the fifth; the flag-oUum is much loiiucr than the 

 body, and is composed of about one hundred joints. 



The first thoracic seoniciit 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 ])eing 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. 



FlG.r)05.— CaRI'IAS BERMtDENSLS. a, MaNDIBI.E. .; 5S. ?J, SECOiXDMAXII-LA. X 5.S. C, FlKST LEG OF 

 MALE. ^ ;!0j. r/, DORSAI, VIEW OK MALE. < 18g. r, MAXILLIPEH. X -58. /, FiRST MA.XILLA. X 58. 



Tiie terminal segment of the body is abont as broad as long, the 

 entire margin smooth, with a small i-ounded lobe ])etween the basal 

 joints of the uropoda. 



Th(> 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 

 ])ranches ai"e of nearly ecjual length, the outer oiu^ 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 l)ody, and are prehensile. The 

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



