ISOPODS OF NORTH AMERICA. 



115 



The first pair of antennae have the peduncle composed of only two 

 articles, both long and narrow; the second is a little longer than the 

 first. The flagellum is composed of fourteen articles, and extends to 

 the posterior margin of the second thoracic segment. The second 

 pair of antennse have the first three articles short and subequal; the 

 fourth and fifth articles are subequal in 

 length, and each is as long as the first three 

 articles taken together. The flagellum is 

 composed of thirty articles, and extends to 

 the middle of the fifth thoracic segment. 

 The maxillipeds are composed of seven arti- 

 cles. The palp of the mandibles is com- 

 posed of three articles. The frontal lamina 

 is short and broad, with the anterior ex- 

 tremity rounded. 



The second, third, and fourth segments of 

 the thorax are subequal, and each is about 

 half as long as the first segment. The fifth, 

 sixth, and seventh segments are subequal, 

 and each is a little longer than any of the 

 three preceding segments. The epimera of all the segments, with 

 the exception of the first, are distinctly separated from the seg- 

 ments. The epimera of the last two segments have the outer post- 

 lateral angle acutely produced. All are crossed by an oblique carina. 



FIG. 



. ClROLANA CUBENSIS 

 (AFTER HAY). 



FIG. 99. ClROLANA CUBENSIS. a, MAXILLIPED. X 27}. 6, MANDIBLE. X 27}. C, FRONTAL LAMINA. 



x 27}. d, FIRST MAXILLA, x 27}. e, SECOND MAXILLA, x 27}. 



The first segment of the abdomen is entirely covered by the seventh 

 thoracic segment, with the exception of the post-lateral angles. The 

 terminal segment is rounded posteriorly and has the posterior margin 

 smooth. The uropoda do not extend beyond the extremity of the 

 abdomen. The inner branch is twice as wide as the outer branch and 

 is posteriorly pointed. The inner branch is obliquely truncate. The 



