CAPRELLA TUBERCULATA. 69 



THE males are much larger than the females. The 

 head, instead of being armed with a tooth, is furnished 

 with a minute tubercle. The first two segments of the 

 body are very long, and smooth ; the second somewhat 

 hirsute. The third, fourth, and fifth are shorter than 

 the preceding, and subequal in length ; these are all 

 tuberculated upon the dorsal surface, as are also the 

 sixth and seventh segments. The tubercles, which are 

 very insignificant upon the third segment, increase in 

 size posteriorly, and are very conspicuous upon the three 

 last segments. The superior antennae reach but little 

 beyond the first segment of the body. The first joint of 

 the peduncle is about the same length as the third, but 

 the second joint is much longer than either. The inferior 

 antennae reach to the extremity of the second joint of 

 the peduncle of the superior. The first pair of legs are 

 very small, and situated quite at the anterior extremity 

 of the first segment of the body, therefore appear to 

 be attached to the head. The second pair of legs articu- 

 late with the second segment of the body at its posterior 

 extremity. The hand is nearly as long as the second 

 segment., and hirsute upon the upper margin and palm. 

 The palm lies nearly parallel with the upper margin for 

 more than half the length of the hand, where it is 

 defined by a strong tooth or process. The finger is 

 furnished upon the inner margin with an obtuse tooth or 

 pointed tubercle. The last three pairs of legs are short 

 and robust. 



In the female the head is surmounted by a strong tooth, 

 directed upwards and forwards. The first segment of 

 the body is short; the second much longer, and tubercu- 

 lated ; the five remaining segments are tuberculated, the 

 tubercles increasing in size posteriorly. The second 

 pair of legs articulate near the anterior extremity of the 



