ISOPODS OF N<mTH AMERICA. 



279 



The first segment of the abdomen hus three suture lines, and its pos- 

 tei'ior margin is produced in two small points, 

 one on each side of the median line, about 

 equidistant from it and tlie lateral margin of 

 the segment. The terminal segment is widel}' 

 rounded posteriorly. The inner branch of the 

 uropoda is of nearl}^ equal width throughout 

 its length and is rounded at its extremit} ; the 

 outer branch is slender and sharply pointed. 

 Both ])ranehes are of nearly ecpial length and 

 neither extends beyond t\n\ tip of the abdo- 

 men. 



The first pair of legs have the i)ropodus 

 dilated and the dactylus reflexible. The pro- 

 podus is large and oval in shape. In the legs 

 of the second pair the propodus is irregular in 

 shape, dilated with refiexible dactylus in the 



male, and simple in the female. The legs of the oth(»r five pairs are 

 similar in structure, ambulatory, and show a gradual increase in 

 leup'th. 



Fig. 290.— Tecticeps convexus. 

 a, Head, x oJ. 6, Abdomen 



.■\ND I,AST THORACIC .'(EGMENT. 



Fig. 291.— Tecticeps coNVEXvs. a, Maxilliped. x 27^. 6, Second leg of female, x 27i. e, Fiest 

 LEG. X 15i. d, Mandible, x ISJ. e, Second maxilla, x 27^ /, Fiest maxilla, x 27}. 



