GYGE HIPPOLYTES. 231 
apparently inarticulate mass of an elongate ovate form, 
somewhat truncated at the base, scarcely with indications 
of divisions between the joints, the extremity being entire. 
The female is broadly ovate, with the body slightly 
curved towards the left, the segments distinct, especially 
those of the tail, which is terminated by a small joint 
notched at its extremity, two minute pleopoda of an elon- 
gate-ovate form arising on its underside and having their 
ends visible within the emargination of the joint. 
The head is broad, furnished on its underside with two 
pairs of minute conical antenne, the inner pair consisting 
of three, and the outer pair of four joints, the penulti- 
mate of which is slightly setose, and the last terminated 
by a minute fascicle of sete; the seven pairs of feet are 
small but robust, and of uniform size and shape, termi- 
nated by an elongate-ovate hand with a minute but 
strongly hooked finger; the two preceding joints being 
rather rugose at their extremities on the underside. 
This species was first described by Kroyer, who de- 
tected it as a parasite on a species of prawn of the 
genus Hippolyte (H. polaris). . 
A specimen of this species is recorded as having been 
taken by the late Mr. W. Thompson, of Belfast, on the 
coast of Galway. The specimen belongs to the Belfast 
Museum, and is, unfortunately in a damaged condition. 
Another specimen (of the female), which appears to 
us to belong to the same species, and which has supplied 
the central figure in the above woodcut, was forwarded to 
us from Polperro by Mr. Loughrin ; our two lower-side 
figures being copied from Kroyer’s figures of the male 
and underside of the female. 
