40 TESTACELLIDZ. 
Dr. Scharff says it is very local in that country, and 
only records it for Dublin. 
Family.—TESTACELLID. 
Genus.—TESTACELLA Cuvier. 
Body of a firm texture, cylindrical; JZeztacles four; mantle 
situated at the caudal extremity ; small, usually covered by the shell, 
which is ear-shaped. 
The Snail Slugs form a link between the naked slugs 
with rudimentary shells, and the snails which live within 
their shells. Their shells, though rudimentary, are external, 
and are situated at the extremity of the tail, covering the 
vital organs. Like many slugs they are carnivorous, but 
to a much greater extent. Jeffreys (British Conch., vol. 1, 
p- 153), says, “‘ They will not eat dead animals,” which is 
not the case with many slugs and snails. They are 
nocturnal in their habits and subterranean. The same 
authority goes on to say, “they only sally out at night in 
search of their prey, burying themselves deep in the 
ground in the daytime. . . . Heavy rains destroy a 
number of them. The average length of life in the 
Testacellae appears to be five or six years.” 
I. T. HALIOT[DEA(resembling the Venus’ ear shell, Haliotis) Cuzzer. 
Pe; ter 
Body pale yellow, capable of great extension, marked with furrows 
of a darker colour branching out from a point just under the shell and 
extending to the head ; wzaztle almost concealed by the shel/, which 
is ear-shaped and very slightly convex above ; /ezgth 3 inches. 
