WORMS. TESTACEA. 8i. Helix. 51 1 
Inhabits frefh waters of Europe and Coromandel, from ali^ loan 
inch in diameter; /f//chefnut, brown, rufous, whiti^ih, yel- 
lowi(h or hlueifh, polifhed and very finely ttriate tranfverfely: 
whorls io cor c, rarely turned contrary : the inhabitant is black, 
vvilh dirty-grey tentacula, and produces a fcarlet but not du- 
rable dye. 
Shell concave each fide, flat, whitifli, with 5 rounded 
whorls. 
Martini Berl. Mogaz, 4. tab. 8. ftg. 20. 
Inhabits ilagnant waters of France and Urmanr. „ . ^ . 
if line diameter, pellucid, yellowifli and hardly ftriate . 
vihorls 4 or 5 : aperture flightly lipped. 
Shell fiattifli, orbicular: aperture oval, the lip fringed. 
Inhabits Born, Muf Caf. test. tab. 14. ftg. 19, zo. 
Chemn.conchi 9. tab, izj.fig- II 24 > 25 - 
Shell fubumbilicate, flat each fide, equal: aperture linear, 
arched. 
Petinj. Gaz. tab. gz. fig. 8. Schrcet.p/c. t. 5./. 29. 
Martini Berl Magaz. i,.tah.%,fig. 2i. 
Chemn conch, g. tab. izp. f. wzb. 
Inhabits ftagnant waters of Europe : 1-2 lines wide. 
Shell o-pskc, brown, chefnut or fulvous, with a pellucid centic : 
nuhorls 3-7, very clofely united; the inhabitant grey, with 
tentacula edged with white. 
Shell poliflicd, yellowifli, above convex, umbilicate, be- 
neath flat, perforated. 
Martini Berl. Magaz. 4. tab. 8. fg. Zz. 
Schrat fiufconch. tab 5. fig 27. _ 
Inhabits ditches of 1-3 lines in diameter. 
diaphanous, highly polilhcd, fometimes brown : Ms 
a.-c, the outmoft much broader than the reit : aperture heart- 
flisped; inhabitant black, the tentacula tipt with white, 
when young entirely white. 
Shell white, umbilicate each fide: aperture dilated. 
Petiv. Gaz '.tab gz. ftg- 7 - Schr.£t,flufc. tab. ;. /. 12. 
Martin: Berl. Magaz. 4. tab. 8. fig- 23. 
Inhabits Denmark, on aquatic plants: i-2 lines wide. 
pellucid, above flattilh, beneath convex; mhorls 4, round, 
with very fine decufi'atc ftrix, the outer larger than all the 
others : apercure Urge, oblique : inhabitant grey, with white 
tentacula and black eyes, 
Similis 
