ORCHESTXA LITTOREA. 
29 
Sand-hopper. It is of a green colour, and hides beneath 
stones and vegetable refuse on the shore. The head is 
smaller than in Talitrus, and the inferior antennae have 
the flagellum rather longer. The female bears a closer 
resemblance to Talitrus than the male. The second pair 
of legs are feeble, and very much like that of Talitrus , 
from which it can only be distinguished by the form of 
the hand of the first pair. 
Orchestia littorea has generally been recorded as asso- 
ciated with Talitrus locusta , but our experience induces 
us to attribute the former to rocky, and the latter to 
sandy, shores. Probably, when there is an approxima- 
tion in the character of the two kinds of coasts, the 
species composing the genera may be found to mingle. 
Montagu on the Devonshire coast, the Dev. George 
Gordon in the Moray Frith, and Professor Kinahan, at 
Kilkenny, report the two genera as being found together. 
But in the long sandy beach in Swansea Bay we never 
took an Orchestia , though they are to be found round 
the Mumble Head. Nor have they been taken in Whit- 
sand Bay, near Plymouth, nor along the sandy beach 
round Exmouth, in all which places Talitri abound.* 
It has also been taken by the late W. Thompson in the 
* We are indebted to Professor Bell, President of the Linnoean Society, 
for tbe following note on the present species Walking along the shore 
at Bognor, on a stormy day and at high tide, I saw them crawling in great 
numbers up the sides of the wooden ‘groins’ (a sort of breakwater so 
called) to which situation they appeared to be driven to avoid the violence 
of the waves beneath. I found them to consist of what I believe to be the 
two sizes of one species, many possessing the strong, prehensile hand on the 
second pair of limbs, and the broad, dilated articulations on the seventh pair 
belonging to this species, and others without these peculiarities. On the 
latter alone, and very commonly on these, I found eggs ; they were, in fact, 
all females, and the others, doubtless, all males ; and as they were found 
promiscuously together, and none of any other form, I could not but come to 
the conclusion above mentioned, especially as they agree in all other cha- 
racters.” 
