48 TESTACELLIDA. 
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 im holes in walls and in 
cellars. They come out at night to feed. The species 
is generally distributed. 
Family I.—TES8TACELLID&. 
Genus.— TESTACELLA. 
1. T. HALIOTIDEA (resembling the Venus’ ear shell, 
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. Mates. 
This species is found in nursery gardens at Bristol, 
whither it was doubtless brought with earth and foreign 
