302 THE ZOOLOGIST. 
peduncles, and are non-retractile; the abdomen is six-jointed in 
both sexes, a fact which Bell was only able to record by reference 
to Milne-Edwards. 
Acheus Cranchii, Leach. 
As before stated, this species is the only one of the genus 
known as British, and its occurrence is rare even in favoured 
localities. The carapace is roughly triangular, contracted behind 
the eyes and suddenly enlarging into a prominence, and again 
into a rounded elevation at its lower angles; the legs are very 
hairy, the last two pairs having curved claws, as in the genus 
Stenorhynchus. 'The antenne are also hairy, and the carapace 
moderately so. The rostrum is stunted, and is formed, as Milne- 
Edwards remarks, of “two little triangular teeth.” The males 
appear to have the tuberculated structure of.the carapace more 
decided than have the females. This species may be distinguished 
from young specimens of the genus Stenorhynchus by a prominence 
on the eye-stalk, by the shorter legs, and by the stunted rostrum. 
Bell records two instances only of the capture of this in- 
teresting species. One specimen is stated to have been placed in 
the British Museum, and the other in Dublin. We have, up to 
the time of writing these notes, obtained sixteen specimens, 
twelve of which were dredged near the Channel Islands, whilst 
four, all males, were found amongst an immense number of various 
species of Crustacea which strewed the Sussex coast after the 
disastrous storm of January 18th, 1881. ‘Two specimens are 
recorded from Galway; and in the Ann. & Mag. of Nat. Hist., 
vol. xvii., 1866, Mr. Spence Bate writes that he finds this species 
not uncommonly off the coast of Devon, and that five specimens 
taken from six fathoms near the Knap buoy off the western end of 
Plymouth breakwater appear to be distinct varieties; his attention 
was drawn to them by their habit, which he says is not usual— 
namely, that of covering themselves with sea-weed. In the typical 
form the spines are straight, which give a hairy appearance. In 
this variety the spines are curved, and lie close to the surface, 
which makes it look smooth. Closely inspected, the spines are 
hooked. Mr. Bate failed, however, to find any other difference to 
indicate that it is more than a variety. In Mr. Carrington’s 
collection are two female specimens of A. Cranchii, well covered, 
even the legs also, with little bits of weed, These were obtained 
