412 THE LAND SNAILS 
opaque, and yellowish white. Umbilicus absent, or 
hardly apparent in adult specimens. Within the aper- 
ture on the outer lip are one or two long thin teeth. 
Diameter of shell about one-fourth of an inch. Animal 
bluish black, upper tentacles long and delicate. A mi- 
nute slit on the extremity of the body exudes mucus 
freely when the snail is crawling. 
This species can at once be distinguished from all the 
others to be described, by the peculiar teeth in the aper- 
ture. Common in the Middle States and Ohio. It has 
been found in the extreme western part of Connecticut. 
Mr. W. G. Binney states that he has generally found them 
in open fields at the roots of grass, and not under decaying » 
stumps and rotten bark. 
Heux concava Say. (Figs. 26,27.) Shell de- 
pressed, whitish horn-color. Whorls five, flattened 
Figs. 26,27. above, rounded below; suture very dis- 
eo tinct. Umbilicus wide and deep, reveal- 
) ing all the volutions to the apex. Aper- 
ture rounded, slightly flattened above. 
‘ss Usual diameter one-half an inch. im 
L} grayish, disk dusty white, with reddish dis- 
7 O colorations. Found in nearly every State 
Ww inthe Union; quite rare in New England. 
This species is peculiar in its habits. It lives in wage 
dark woods, and is a regular cannibal in its propensities. 
Its body is long, slender, and worm-like. Its jaw has 4 
sharp projecting point to cut and tear its prey, and the 
teeth on the tongue are unusually long and pointed, a> 
well adapted to subserve its rapacity. It lives on the 
flesh of other snails. With its long and slender body; it 
insinuates its head into the aperture of the shell, the 
inmate of which it is about to devour. The victim with- 
i 
