CAPRELLA ACUTIFRONS. 61 
fourth, which in the female carry the ovigerous plates, 
have, in the male, the lateral walls (coxze) produced into 
lateral plates, which are produced anteriorly to a point. 
The superior pair of antenne are about two-thirds the 
length of the animal, the flagellum is shorter than the 
peduncle, and each articulus is infero-distally produced, 
and furnished with cilia. The inferior antennze are 
about the length of the peduncle of the superior, termi- 
nating in a short flagellum, which consists of a long and 
a short articulus. The first pair of legs are short, but the 
form of the hand resembles that of the second. The 
second pair of legs are longer than the first. In the 
female they articulate with the extreme anterior limits of 
the second segment, but in the male they articulate a 
little posteriorly. The hand, in the male, is ovate, 
tapering to the distal extremity; the palm is waved, and 
defined by a strong tooth, armed with a stiff spine. In 
the female the palm is less distinctly waved and de- 
fined. The three posterior pairs of legs are short and 
robust. 
The only animal that we have seen alive was covered 
with numerous points or fine hairs, It was of a reddish 
colour, shaded off into green. 
This species appears to be one of the least dispersed in 
the British seas, and our observations have consequently 
been the more restricted. 
It was found by Dr. Leach on the Devonshire coast, 
and it has since been taken in Plymouth Sound by 
Mr. Boswarva. ‘‘ Not uncommon among Corallines in 
Mount’s Bay.”—Mr. R. Q. Couch. 
Van Beneden states, that it is found in great abundance 
on the shores of Belgium, in the middle of tufts of con- 
fervee along with Tunais, upon the carapace of Chelonia 
mydas. 
