34 
0RCHESTIIM1. 
female, bears a close resemblance to that of O. littorea , 
agreeing with it both in colour and habits ; but we are not 
sure that it is so common, or that they are found associated 
together, although frequently confounded with each other. 
Edwards, Rathke, and Lucas have so mistaken it, sup- 
posing it to be Montagu’s species, as we have ascertained 
from an examination of the typical specimens in the 
British Museum and the Museum of the Jardin des 
Plantes.'* 
We first took the species under a stone far above high- 
water mark in Langland Bay, near Swansea. It was 
so far from the shore that the grass grew all round the 
stone, beneath which it was associated with terrestrial 
Isopoda (Oniscidcd) . We have also taken it on the 
shore near the Bailey Lighthouse on the Hill of Howth, 
in Dublin Bay, in the month of October sparingly, 
but it was found in numbers, and of various sizes, in the 
month of January, among gravel on the beach of Rough 
Island, Shangford Lough, by Mr. W. Derragh, by whom 
it was communicated to the late Mr. W. Thompson, 
These specimens are now (together with his whole collec- 
tion) in the Museum of Belfast, and we have much 
pleasure in returning our thanks to the trustees of that 
excellent institution for the use of the whole of the 
Edriophthalma collected by that late eminent Irish na- 
turalist. Professor Kinahan has taken it seven feet above 
tide-mark, mixed with Oniscus murarius , 0. fossor , Arma- 
dillo vulgaris, and Porcellio scaber. These are the only 
recorded British habitats, a circumstance that arises most 
probably from the species being mistaken for 0 . litlorea, 
* We take this opportunity of expressing our obligation to the officers of 
both these institutions for the courteous reception we have invariably met with 
from them, the willingness with which every specimen has been placed at 
our disposal, and the forestalment of our wants in facilitating their exami- 
nation. 
