R244 BOPYRID. 
than lobes analogous to those of Ph. Paguri, fusticaudatus, 
&c. The body is rather broadly ovate, nearly symmetri- 
cal, the head being bent a little to the left; flat on its 
dorsal surface, its ventral side being concealed by large 
ovigerous scales, which do not extend over the sides of the 
body so as to conceal the legs, which are not very robust. 
The antennz are very minute, and in the middle of the 
head, on the underside, is a small somewhat semicircular 
raised lobe. The segments of the tail are continuous 
with the hinder part of the body, the flattened lateral 
scales of the former rendering the joints nearly as wide 
as the latter, the pair of these scales attached to the ter- 
minal segment are directed backwards and are somewhat 
more pointed at their extremity. On the ventral surface 
of the tail are two rows of fleshy somewhat elongate 
cylindrico-conic appendages, obtuse at their extremities, 
and which when stretched out do not extend beyond the 
sides of the tail, and are consequently not visible from 
above. 
In addition to the specimens obtained from Hermit 
Crabs described above and in the following pages, we 
have received an exceedingly minute male, captured 
on a Pagurus Bernhardus on the coast of Durham, which 
we cannot satisfactorily assign to its legitimate partner. 
It is preserved in Canada balsam, and is of an elongate 
form, somewhat ovate in its general outline, with the 
sides of the segments of the body and tail regularly 
rounded, without any wide interval between them. The 
outer antenne are sufficiently large to extend beyond 
the sides of the head; they are three-jointed and seti- 
gerous at the tip, and the inner antenne are extremely 
minute and two-jointed ; the mouth appears to consist of a 
conical tubercle in the middle of the lower surface of the 
