PHILOSCIA COUCHII. 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 full in). 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 Couchii 

 will be seen hiding among the shingle, and easily distin- 

 guishable from P. muscorum, which also occurs, by its 

 uniform colour." 



