TERRESTRIAL ISOPODS FROM NORTH DEVON. 469 



Metoponorthus prninosus, Brandt. — Of a faint blue colour, 

 with two joints to the flagellum, and with long hind legs. 

 Has occurred at Exeter (Parfitt) and Torquay (Stebbing). I 

 discovered one only, in the vicinity of our own house. I rather 

 fancy it escaped from a bundle of moss which I had brought 

 home to examine for beetles. 



Armadillidium nasatum, Budde-Lund. — At Santon in large 

 numbers on the cliff-top under stones. Last summer I took a 

 beautiful specimen (19 mm.) of a handsome " butter-scotch " 

 yellow colour ; also two smaller ones of the same colour. The 

 ordinary grey form is also to be seen in numbers at Venn and 

 near Braunton, and on the banks of the Taw near Wrafton. It 

 is local. 



A. vulgare, Latr. — The Common Pill Louse. Common. I 

 have not noticed it on Codden Hill and other high hills in the 

 district. 



A. pidchellum, Zenck. — On Sept. 19th, 1907, I found one 

 specimen under a piece of chert among the heather on Codden 

 Hill (600 ft.). It is 6 mm. in length and smooth, but the dorsal 

 surface is punctate. 



On the sands under seaweed, &c, at the estuary of the Taw 

 and Torridge, I collected several specimens of an Armadil- 

 lidium this spring which I have been unable to identify. They 

 were slightly longer than A. pidchellum, of a white colour, 

 with the distal joint of the flagellum three times the length of 

 the other, and the upper surface not smooth but slightly 

 wrinkled longitudinally. The antennae were short (1\ mm.) ; the 

 telson truncated at the end, and the frontal lobe low. One out 

 of the six I took was close approaching the normal grey colour of 

 the Armadillidia. 



There is much we do not know about the variations of the 

 different species, and of the development of the young after they 

 have left the brood-pouch. In the winter Oniscus asellus be- 

 comes sluggish, but does not hybernate. Armadillidium seems to 

 hybernate, and sleeps very deeply ; at this time it cannot 

 be unrolled without injuring the animal. Further, they seem 

 to burrow deeply below the earth to hybernate, as I have found 

 Armaddlidium much less frequently in the winter. One spot I 

 know, where I could scarcely see one specimen of A. nasatum at 



