BRITISH STALK-EYED CRUSTACEA. 171 
It has been surmised that this species and Crangon sculptus 
are identical with C. boreas of Phipps, and, from my experience, 
I should say that not only was this possible but that many of 
these smaller forms might actually represent a less number of 
species than they do at present. They do not occur in sufficient 
numbers, nor with sufficiently marked characteristics of habitat, 
&c., to be regarded as good species ; for differences of locality, 
time of year, and other circumstances, often result in features 
of a more or less varied type. I have known differences of 
opinion to exist regarding the identity of larger Species than 
these, and I think it more than possible that the genus Crangon 
does not embrace so many species in reality as we at present 
credit it with. 
Crangon Pattersonii. 
A species under this name has been recorded in the ‘ Natural 
History Review’ as having been found at Belfast. 
Crangon spinosus. 
This species differs from the preceding ones chiefly in having 
five rows of spines on the thorax, pointed forwards; in other 
respects it much resembles other Crangons. Bell regards 
it as rare, but of rather wide distribution ; but also states that 
Leach speaks only of two specimens, one from Plymouth and 
the other from Falmouth. He also records it from Shetland and 
Treland. 
It is elsewhere recorded: from Shetland as common ; Galway 
as rare; Belfast, Northumberland, and Durham coasts; South 
Devon, frequent. It has been also specially recorded from off 
Tynemouth and Berwick, at which latter place a specimen 2} 
inches in length is said to have been taken: this is certainly 
large. It is also said to have been taken in the Adriatic Sea. 
Crangon sculptus. 
This species is described as differing from the preceding 
one “in the less regularly longitudinal direction of the lateral 
raised lines on the carapace, the less pointed and fewer teeth of 
this part, the longer proportion of the antenne-scale with rela- 
tion to the peduncle, and, strikingly, in the sculpture of the 
abdominal segments, and the extent and sharpness of the carina 
