ES WORMS. TESTACEA. 82. Nerita. 
Peregrinae Shell ovate, imperforate: whorls round, diftant and equal- 
ly decreafing: aperture oval. 
Schrat. Einl. in conch. 2. tab. 4. fig. 11. 
Inhabits American Iflands: half an inch long. 
Shell hyaline, fometimes teftaceous, opake, with 8 or 9 whorls. 
Danubialis. Shell oblong, imperforate; with diftant ventricofé whorls: 
_ aperture orbicular. 
Marfigl. Danub. 4. tab 31. fig. 1. 
Schrat. finfconch. tab. Yo. B. fig. c. 
Inhabits the Danube: 2% inches long; 
Turbinata. Shell oblong, imperforate, fmooth, pointed: whorls in- 
fated, the firft much larger, the reft gradually de- 
creafing: aperture fuboval, margined. 
Marsigl. Danub. 4. tab. 31. fig. 2. 
Schret. fluconch. tab. 10. B. fig. Y. 
Inhabits the Danube: 3} inches long, and lefs ventricofe than 
the laft. 
Curvata. Shell oblong, curved, fubimiperforate, with an oval mar- 
gined aperture. 
Marfigl. Danub. 4. tab. 31. fig. 4. 
Schrat. flufconch. tab. 10. B. fig. 3. 
Inhabits the Danube: 2% inches in diameter. 
Exilis Shell thin, fmooth, white with chefnut bands: fpire ob- 
tufe, with flattifh whorls. 
Kaemm. Cab. Rudolf}. tab. 12. fig. 3. 
2. Kemm. Cab. Rud. tab. 12. fig. 2. 
3: Kamm. Cab. Rud. tab. 10. fig. 2. 
Inhabits Shell 6.-8 lines, 3) an inch long. 
82. NERITA. Animal a Limax: hell uni- 
valve, fpiral, gibbous, flattifh at bottom: 
aperture femiorbicular or femilunar: 
pillar-lip trantverfely truncate, flattifh. 
Ner ite. 
A. Umbilicate. 
Canrena. 
Shell fmooth, with a flightly pointed fpire, and gibbous 
bifid umbilicus. 
Lifer, tab. 559. f. 1. tab. 560. f. 3455+ te $61. f. 7. t. 563, 
£64, 5€6, f. 16. t. 568 ? 7.572, fe 25. 
Bona». 
