PHILOSCIA COUCHITI. 453 
fringed with stiff bristles, sides excavated. Posterior 
pleopods (uropoda) with the ischium (outer ramus) elon- 
gate, falciform, subulate. Accessory appendage (inner 
ramus) scarcely one-fourth the length of the ischium. 
In other respects as in Philoscia muscorum.” The colour 
is lead-grey, and uniform to the naked eye. 
The species runs with agility, but does not roll itself 
up into a ball. It was discovered at Talland Cove, near 
Polperro, from whence we were returning accompanied 
by Professor Kinahan, who gives this account of its dis- 
covery :—‘‘ In returning home we took the cliff road, 
and at Talland Cove spent a few moments examining the 
supra-littoral zone (the tide being nearly fullin). Here, 
as might be expected, Ligia oceanica, Porcellio scaber, 
Philoscia muscorum, and Orchestia littorea, were abundant ; 
but I was much pleased by also meeting with a Philoscia 
new to me, and also undescribed in the books. ‘This I 
have named Philoscia Couchii, in memorial of one of the 
pioneers in the study of the zoological geography of 
England, and of a few pleasant hours spent in his com- 
pany. The species appeared abundant, and the following 
description of the spot where it occurred may probably 
aid others in finding it:—Having descended the hill from 
Polperro, you cross the stream which drains an extensive 
osier marsh. The road then turns up a narrow ferny 
lane into a very heavy hill. Instead of turning up this 
lane, keep straight on from the bridge, and a few yards 
brings you up at the foot of the cliff. Here, amongst 
the loose stones and sea-weed carried up by the high 
tides into the clefts of the slate rocks, in company with 
the other Oniscoids, and many Myriapods, Philoscia Couchiu 
will be seen hiding among the shingle, and easily distin- 
guishable from P. muscorum, which also occurs, by its 
uniform colour.” 
