1182 CRUSTACEA. 



men six-jointed ; the first or basal segment short, having two very short 

 setas on either side at apex of this segment and the following one. Ante- 

 rior antennae of the male have the first three joints quite stout, with a 

 few short setae on the front margin, and one or two at apex of first 

 and second joints, which are as long as the first joint, or rather exceed 

 it; other setae of the antennas much shorter. 



The fourth joint of the anterior antennas in the male corresponds 

 to four joints in the female, as is apparent from indistinct articula- 

 tions ; the fifth corresponds to three, and the sixth to two joints in 

 the female ; so that the relation of the two may be expressed as fol- 

 lows : — 



In the female, the first two and the last three joints are the longest; 

 the setas of the three terminal joints are about as long as the joints, or 

 a little shorter; the posterior seta of the antepenult joint is longer 

 than the anterior of the same ; the terminal joints are more slender 

 than in the male. In the male, the extremity of these organs may be 

 flexed upon the basal portion, and there is a geniculating joint, 

 though it is not very distinct. 



The maxillipeds terminate in a small moveable finger, having a 

 claw and two or three short setae at the extremity. The preceding 

 joint is stout and has a projecting angle on the inner side, which is 

 tipped with a minute spine, and the moveable finger folds against the 

 surface below this spine. The stomach occupies nearly the whole 

 cephalothorax, the intestine commencing in the segment before the last, 



The ovarian sacs, in the females examined, were much elongate, a 

 little divergent, projecting behind and some distance beyond the apex 

 of the stylets. The number of eggs was quite large. 



Cyclops curttcaudus. 



Feminae : — Mtdus. Cephalothorax posticd obtusiis, abdominem longitudine 

 valde superans. Antennce anticce dimidio cephalothorace valde longiores, 

 lo-li-articidatee, articulis brevibus, quinque basalibus non oblongis; 



