90 LIMNZA. 
4, LIMNAZA DECOLLATA, Mighels. 
Hald., p. 52, t. 14, figs. 1—3. 
Shell very ventricose, rather thick, sub-ovate 
or subrotund, in outline an irregular rhomboid; 
epiderniis of an olivaceous green color, rather 
thin, deciduous ; whorls two to three; spire 
very short, generally decollated; whole surface 
generally rather rough; strize of growth coarse 
and fine alternately; transverse strize on the 
body whorl sparse, interrupted, sometimes 
obsolete; body whorl composes almost the 
whole shell; aperture very large, subcampanu- 
late; its length is very little greater than the 
breadth, and occupies more than two-thirds 
the length of the shell; labrum rather thin, 
simple; fold of the columella very prominent. 
Length 15, diam. 10-5 mill. 
‘Unity, Maine; Connecticut. 
This species, confounded by Haldeman with 
L, catascopium, is nowsvery generally acknow- 
ledged to be distinct, and, in fact, to belong to 
a different group of species. 
(64) 
