2345 HISTORY OF BRITISH CRUSTACEA. 



Sea-shore, very abundant. 



The species occur in moist places, under stones and slates. 

 The female carries her eggs and even her young beneath the 

 thorax j the young have at first only six thoracic rings and 

 six pairs of walking legs ; the seventh ring is rudimentary. 

 These Crustacea seem to feed indifferently on vegetable and 

 animal matters, and are themselves preyed on by birds. 



Gen. 118. ONISCUS, Latr. 



Outer antennae with the base concealed by the projecting 

 front margin of the head ; these appendages are eight- 

 jointed ; the tail appendages are four-, the side ones two- 

 jointed. 



Oniscus asellus, L. Land-Slater. — Body smooth, of a 

 darkish-grey above, with two rows of yellow spots on the 

 back, and on each side two rows of whitish spots ; the under 

 side of the body whitish. 



Yery common in gardens and damp houses. 



Gen. 119. PHILOSCIA, Latr. 

 Outer antenna? exposed at the base, with eight joints. 



