472 ONISCIDA. 
opaque upper surface of the body, which is finely punc- 
tured and furnished with the same kind of oblong 
tubercles found in O. asellus, but more numerous and 
closely arranged. ‘The head also is more prominent. 
It is of a more uniform brownish-grey colour, although 
exhibiting the same kind of pale patches and rows of 
spots seen in that species. It also appears to be uni- 
formly smaller than O. asellus. 
We have adopted the reference to Koch’s figure of 
Oniscus fossor, which Professor Kinahan states to be very 
characteristic, although the flagellum of the antenne is 
only represented with two instead of three joints, as in 
the type of the genus. 
This species inhabits dry places under stones and dry 
leaves. It is more active than the preceding species. It 
has been taken in Epping Forest and Chiselhurst, Kent, 
and near Dublin and Wexford, in Ireland. Specimens 
are in the British Museum, as well as in the Stephensian 
Collection of Crustacea at Oxford, purchased by the 
Rey. F. W. Hope, the latter being named O. asellus ; 
and the Rev. A. M. Norman records it from Sedgefield, 
Co, Durham. 
_—s 
