The Shell-Collector’'s Handbook. 81 
inch in length; whorls five; spire turreted; suture deep; 
last whorl more than half the total length of the shell, 
Fic. 10.—2Z. Palustris. m. turritum. 
and flattened at the sides, instead of being rounded as in 
a typical specimen. The upper whorls somewhat eroded. 
LIMNAA TRUNCATULA, MULL. 
SHett oblong-oval, turreted, glossy, pale brown or 
yellowish horn-coloured, striated strongly in line of 
growth ; whorls five to six, rounded, deeply separated 
from one another, and somewhat truncate above, the 
body whorl occupying about 3ths the length of the shell ; 
_ Spire produced; apex acute; suture very deep; mouth 
ovate-oblong, and nearly half as long as the shell; um- 
bilical chink distinct. Length of shell 43-inch. Animal 
greyish, finely spotted with black. 
Habitat.—Marshes, ditches, waterfalls, pools, and 
muddy streams. 
v. major (Mogq.): Shell larger, ashy, more tumid. Alt., 
10-15 mm. 
v. minor (Mog.): Shell smaller, horn-coloured. 
v. ventricosa (Moq.): Shell same size as type, more 
ventricose ; spire short; peristome without swelling. 
v. microstoma (Drowét): Shell small, spire elongated, 
whorls more convex, aperture smaller and narrower (H. 
Drouét in Baudon, Moll. Orse, 1862, p. 14.) 
v. elegans (Jeff.): Shell much larger, more solid and 
slender, greyish-white, marked with coarse spiral ridges ; 
spire much produced ; suture oblique ; outer lip thickened. 
(&.C., vol. 1., p. 116.) 
& 
