90 LIMN^A. 



4. LIMN^A DECOLLATA, MigJiels. 

 Hald., p. 52, t. 14, figs. 1—3. 



Shell very ventricose, rather thick, sub-ovate 

 or subrotund, in outline an irregular rhomboid ; 

 epidermis of an olivaceous green color, rather 

 thin, deciduous; whorls two to three; spire 

 very short, generally decollated ; whole surface 

 generally rather rough ; striae of growth coarse 

 and fine alternately ; transverse strise 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 now very generally acknow- 

 ledged to be distinct, and, in fact, to belong to 

 a different group of species. 

 (64) 



