204 MR. G. S. BRADY ON AN ENTOMOSTRACAN 



supply of specimens is easily attainable. The position here as- 

 signed to it must therefore be looked upon as merely provisional. 



Order. COPEPODA. 

 Family. HARPACTID^. 

 Genus. CANTHOCAMPTUS. 



Canthocamptus cryptorum, nov. sp. 



Body slender, gradually tapered, the cephalothorax not very 

 much stouter than the abdomen ; first segment equal in length 

 to the following five. Superior antennae eight-jointed, those of 

 the female (fig. 2) slightly tapering from base to apex, somewhat 

 constricted at the fifth joint; joints not much diiFering in length, 

 fifth and seventh rather the shortest, sparingly setose, and hav- 

 ing no distinct flagellum ; two long set« from the upper margin 

 of the second joint, five or six from the third, one or two from 

 the fourth, fifth, sixth, and seventh, and about six from the 

 apical joint, two of which are much longer than the rest. First 

 four joints of the upper antennae of the male (fig. 8) stouter than 

 the rest, the fourth swollen and bearing six or eight sette, pen- 

 ultimate joint very short, last joint bearing four short terminal 

 setae. Inferior antennae (fig. 4) bi-articulate, bearing a short 

 secondary branch. Lower foot-jaw (fig. 5) weak, chelate, ter- 

 minal claw slender and slightly curved. First pair of feet (fig. 6) 

 two-branched, both branches tri-articulate and of nearly equal 

 length, terminal joints the longest, basal joint of the inner branch 

 having round its distal margin a spinous fringe ; terminal joint 

 scarcely twice as long as the middle one and armed with one 

 short and one very long apical seta, the middle joint having one 

 seta at its apex ; the terminal joint of the outer branch has two 

 long but unequal apical seta, one strong spine, and on the outer 

 margin two short and one rather longer spine ; the preceding 

 joints are armed with a similar arrangement of spines. Inner 



