48 TESTACELLID^E. 



with variable colouring. Adult specimens range from 

 four to six inches in length. The shell is oblong, 

 slightly convex above and concave below, marked with 

 lines of growth ; margin membranaceous. 



These slugs congregate in holes in walls and in 

 cellars. They come out at night to feed. The species 

 is generally distributed. 



Family FL TESTACELLIDJS. 

 Genus. TESTACELLA. 



1. T. HALIOTIDEA (resembling the Venus' ear shelly 

 Haliotis) . 



This slug is peculiar in having its shell nearly at the 

 end of its tail, where its apology for a mantle is situated, 

 almost covered by the shell. 



It is carnivorous, eating earthworms, and possibly 

 its own species. It is found at Norwich, Plymouth, 

 Clifton, near London, and in the south of Ireland. 



Var. scutulum. Shell narrower, more pointed. 



2. T. MAIJGEI. 



This species is found in nursery gardens at Bristol, 

 whither it was doubtless brought with earth and foreign 



