110 BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



The frontal lamina is conspicuous, short and broad, with the anterior 

 margin somewhat triangulate. 



The first segment of the thorax is twice as long as any of the others, 

 which are subequal. The epimera are distinct on all the segments 

 with the exception of the first. Those of the last two segments have 

 the outer post-lateral angle produced beyond the posterior margins of 

 the segments. A carina crosses all the epimera, being oblique in the 

 last four and longitudinal in the first two. 



The first two segments of the abdomen are entirely concealed by the 

 seventh thoracic segment. The sixth or terminal segment is attenua- 

 ted posteriorly , with the apex rounded, and furnished with eighteen 

 spines placed close together. The inner branch of the uropoda is as 



IG. 91. ClROLANA HAEFOBDI. O, MAXILLIPED. X 27}. b, SECOND MAXILLA. X 51f. C, FIRST 



MAXILLA, x 51}. d, MANDIBLE, x 27}. e, FROTAL LAMINA, x 51}. 



long as the terminal segment of the body. It is broad posteriorly, with 

 the posterior margin and the distal end of the exterior margin armed 

 with spines. The outer branch is almost as long as the inner branch, 

 is narrower and rounded posteriorly, and has its margins armed with 

 spines. The peduncle of the uropoda has the inner angle produced to 

 extend two-thirds the length of the last abdominal segment. 



The first three pairs of legs are prehensile, the last four pairs ambu- 

 latory. In the first pair-there are three spines on the propodus, one o 

 the carpus, three small sharp ones on the merus, and six large blunt 

 ones, one long slender, pointed one, and one large blunt one on the 

 ischium, with another long stout spine at the outer distal end. On the 

 second and third pairs there is an additional spine on the propodus, 

 three spines on the carpus, nine spines on the merus, with a small 



