988 NERITA. 



Desc. Anim. p. 128. Born Mus. p. 401. Gmelin, p. 

 3676. Schreibers Conch, i. p. 323. 

 ArgenviUe, t. 7. f. M. Geve, t. 22. f. 226. 



Inhabits the Red Sea. Forskael. 



Born says this species is six lines long and eight broad, and he 

 has given the following description : " Shell sub-globular, 

 brittle, with an obtuse short spire ; whirls contiguous and 

 obsoletely truncated transversely ; aperture toothless, with 

 the outer lip acute, and the inner lip flattened with its mar- 

 gin entire ; colour black, with two dorsal transverse bands, 

 and scattered yellow dots." 



FLUviATiLis. 24. Shell minutely wrinkled, and 

 the lips toothless. 



Nerita fluviatilis. Linnaus Syst. 'Nat. p. 1253. Muller 

 Verm. ii. p. ]<J4. Pennant Zool. iv. p. 141, t. 87. f. 142. 

 Da Costa Brit. Conch, p. 48. t. 3. f. 17 and 18. Schroe- 

 ter Flnss. p. 210. t. 5. f. 5 to 10, and 1. 11 C. f.8 ; and 

 EinL ii. p. 286. Chemnitz, ix. part 2. p. 72. t. 124. 

 f. 1088. Gmelin, p. 3676. Schreibers Conch, i. p. 323. 

 Donovan, i. t. l6. f. 2. Montagu Test. p. 470. Maton 

 and Racket, in Lin. Trans, viii. p. 225. Dorset Cat. 

 p. 57. t. 16. f. 17 and 18. 

 Nerita lacustris. Born Mus. p. 402. 

 Le Nerite des Rivieres. Geoffroy, p. 118. No. 5.t. 3. 

 Lister Anim. Ang. t. 2. f. 20, and Conch. 1. 141. f.38, and 

 t. 607. f. 43 and 44. Petiver Gaz. t. Ql . f. 3. Gualter, 

 t. 4. f. LL. Argentine, i. 27. f. 3. Geve, t. 24. f. 258 

 to 265. Martini Berl. Mag. iv. t. 8. f. 27 and 28. Fa- 

 mnne, t.6l. f. D3, D4, D 17, and D 20. 

 Variety. Shell larger, and yellowish, with parallel black lon- 

 gitudinal stripes. 



Nerita cornea. Mus. Leskeanum, p. 29 1 . ? 

 Zebra Neritarum fluviatilium. Chemnitz, ix. part 2. p. 67. 

 t. 124. f. 1080 and 1081. 

 Inhabits rivers in Europe. Linnccus. Great Britain. Lister, 

 &)C. France. Geoffroy. Saxony. Schroeter. The Variety 

 is oriental. Chemnitz. 

 Shell commonly about three-eighths of an inch long, and two- 

 eighths broad, frequently covered with a brownish green 

 epidermis, beneath which it is elegantly spotted, streaked, 

 mottled or reticulated with white and purplish brown, black, 

 red, or green, in such an infinite variety of ways, that it is 

 difficult to procure two specimens alike ; it has three whirls, 

 of which the body-whirl is very large, and the others very 



