CAPRELLA TUBERCULATA. 69 
Tur 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 antennz 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 
antennee 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 les 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 
