598 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxviii. 



long 1 as wide, apparently unsegmented. From a study of the figures 

 given b}^ Kroyer and Steenstrup and Liitken, and from comparison 

 with the developmental history of C. honito it would seem reasonably 

 certain that in the present species there is a similar development. In 

 immature females the abdomen is plainly two-jointed, the joints being 

 fairly equal, but as development proceeds the terminal joint increases 

 faster than the basal. Hence, in mature females the abdomen is prob- 

 ably two-jointed, with the basal joint only one-third or one-fourth of 

 the terminal. Anal laminae small, foliaceous, and curved in toward 

 each other. The plumose setas, with which they are armed, are rather 

 small. Egg cases narrow and reaching only to the tips of these setas, 

 each containing about thirty eggs. 



Anterior antennas with a short, stout basal joint and a very slender 

 terminal joint of about the same length, the whole appendage less than 

 the space between the lunules. 



Second antennas with a stout basal joint bearing a short and blunt 

 accessory spine on its posterior border. 



First maxilla? small and strongly curved; second maxillae narrow 

 triangular with acuminate tips, twice as long as wide and straight. 



First maxillipeds slender and of the usual form; second pair large 

 and stout, the basal joint much swollen, the terminal claw small. The 

 claw is scarcely half the length of the basal joint, but is stout and well 

 curved. 



Furca slender, the basal portion narrower and shorter than the 

 branches, almost circular in outline, and connected with the branches 

 by a narrow neck. The branches are divergent, rather slender, and 

 blunt. 



First swimming legs with the usual armament of three terminal claws 

 graded in size, a long slender plumose seta at the distal corner beside 

 the smallest claw, and three rather small plumose setas on the posterior 

 margin. The spines on the exopocls of the second legs are very long 

 and acuminate; the two on the two basal joints are inclined at an angle 

 of about 45 degrees with the anterior margin, while the one on the 

 terminal joint is nearly parallel with that margin. 



The rami of the third legs are well separated, but the two terminal 

 joints of the exopod are turned in and appressed close to the margin 

 of the basal apron. And they reach so far across the intervening- 

 space between endopod and exopod that the two rami appear close 

 together. The spine on the basal joint of the exopod is long, slender, 

 and curved into a sickle shape. 



The fourth legs are of medium size, but rather short and three- 

 jointed, with only four spines, one at the distal end of the second 

 joint, one on the outer margin, and two at the end of the terminal 

 joint. The last three are almost in a row, the outer one being but a 

 little behind the others. All these spines are very long and acuminate; 



