68 J. R. KiNAHAN on the Britannic Species of 



rately stout, half the length of first and third, didactyle ; the hand short and 

 robust. The third pair are very slender, as long as the first, and simple. The 

 fourth and fifth are longer than the third, and somewhat thicker, but yet slen- 

 derer than the second. 



The external maxillipeds are long, their ultimate joint about equal to the 

 penultimate, moderately broad. 



The external antennte are short ; their scale short, broad, toothed exter- 

 nally. Hyposternal tooth long and pointed. 



Colour opaque dead white, with black and brown dots. 



Length 0.8 inch. 



Habitat sandy gravel, in 20 fathoms. 



Localities, Dublin, ofi" Back ; Galway, Isles of Arran, Professor Melville. 



In ova in June ; ova greyish. 



This species, of which a single specimen only was met at Hastings, by its 

 discoverer, IVIr. Hailstone, was added to the Irish lists by Professor Melville : 

 several specimens occurred to him. I dredged a female specimen in ova in 

 June, 1860, ofFDalkey, from which the above description is drawn up. 



It may be distinguished from the other species of Cheraphilus by the cha- 

 racters of its rostrum and carapace. It somewhat resembles iEgeon fasciatus 

 when living; but the characters of the rostrum, &c., supply an easy means of 

 distinguishing the two species. 



