WORMS. TESTACEA. 84. Patella. 577 
Luteas Shell entire, oval, convex, ftriate, with a fubmarginal re- 
fle&ed mucronate crown. 
Rumpf. Muf. tab. 40.1. Mart. conch. 1. t. 17. f. 154, 155. 
Inhabits ZzZia: fize of a melon feed. 
Shell fulvous: crown furrounded with a reddiffi ring. 
Cristatae Crown revolute: back crefted, carinate. 
Inhabits Shellcompreffed, fragile, diaphanous, with nume- 
rous tranfverfe grooves, and a very thin double membrane on 
the back irregularly cut; border finuate: aperture with an 
acute dorfal angle. 
* Lacustris. Shell very entire, oval, membranaceous, with a neatly 
central mucronate reflected fhell. 
Argenv. conch. tab. 27. fig. 1. Zoom. t. 8. f. t. 
Ginan. op. pofl. 2. tab. 2. fig. 11. dent test. Y. 
Martini Berl. Magaz. 4. tab. 7. Fg. Ca 
Inhabits frefh waters of Europe: 11—22 lines long. 
Shel] very thin and brittle, pellucid, white; above convex, be- 
neath concave: crowns with a very minute point: inbabiant 
with 2 truncate concealed tentacula, furnifhed with eyes at 
the interior angle. 
*Fluviati- Shell very entire, oval, a little horny, with a marginal 
is. ; mucronate crown: aperture oval. 
Lister, tab. 141. fig. 39. Anim. Ang. t. 2 f. 5 32. 
Gualt, test. tab. 4. A A. BB. Arg. conch. 1. t. 27. f. 1. 
Martini Berl. Magaz. 4. tab. 7. fig. t, 
Schreet. flusconch. tab. 5. fig. 1—3. 
inhabits rivers of Europe : 23 lines long: refembles the lait. 
Shell brittle, pellucid, with d a few concentric ftriz : point of 
the crowz rather obtufe, 
Ceca, Shell entire with elevated dots and ílriate: crown acute; 
{traight. 
Mull. S Dan. 1. tab. 12. fig. V--3. 
Inhabits bays of Moravay, on ftones. 
Shell white, with 60--89 ftriz : inhab:tant white, ovate, without 
the leaft appearance of eyes, 
Virginec. Shell very entire, white with red. bands. 
Mull. Zool. Dan. 1. tab. 12. fig. 4, § 
Inhabits bays of Noravay, on Fuci. 
Shel minute, with about 18 bands and very minute concentrie 
ftria, within yellowifh ; inhabitant white, with a very broad 
chefnut lap or membrane and black eyes, 
VOL.IV. — 4D J effelata. 
