1000 NERITA. 



by LinnaBUs for N. Exuvia, and appears to be different 

 from the description. 



PLICATA. 49. Shell transversely ribbed, and the 

 spire pointed ; outer lip crenated, and toothed 

 on the inner margin ; inner lip convex, wrink- 

 led, and strongly toothed. 



Nerita plicata. Linnaus Si/st. Nat. p. 1255. Born Mm. 



p. 407. t. 17. f. 17 and 18. Chemnitz, v. p. 293. t. igo. 



f. 1952 and 1953. Schroeter Einl. ii. p. 298. Gmelin, 



p. 368 1 . Schreibers Co7ich. i. p. 328. Museum Lesk, 



p. 295. 

 Nerita tricolor. Gmelin, p, 3686- 

 Le Selot. Adanson Senegal, p. 19 1, t. 13. f. 4. 

 La Nerite a dents de Cheval. Favanne, ii. p. 226. t. 10. 



f. Q3. 

 Bonanni Rec, 3. f. 386, and Kirch, f. 371. Lister Conch. 



t. 595. f. 3. Gualter, t. 66. f. V. Klein Ost. t. 5. f. 100. 



Seba, iii. t. 59- f. 18. 

 Fariety. White without any spots. 

 Nerita lactaria. Linnaus Mantissa, p. 551. Schroeter 



Inn. Bau Conch, p. 70. t. 1. f. 5. 

 Inhabits the coasts of the Isle of France and Madagascar. Fa- 



vanne. Tranquebar. Chemnitz. 

 Shell three-quarters of an inch or an inch long, and about 

 equally broad, of a white or reddish white colour, with 

 brown or black spots on the ribs, or sometimes marked with 

 undulated dark longitudinal stripes ; the spire is sometimes 

 yellowish ; the inner margin of the outer lip has about eight 

 teeth ; the inner lip is convex and wrinkled, and has about 

 four strong teeth on the margin, which are bent somewhat 

 inwards ; the aperture is narrow and white, and the throat 

 yellow. 



ASCENSiONis. 50. Shell strongly ribbed transverse- 

 ly, with the spire produced, and the outer 

 lip entire: inner lip slightly concave, gla- 

 brous, and the margin denticulated. 



Nerita Ascensionis. Gmelin, p. 3683. 



Nerita, No. 101. Schroeter Einl. ii. p. 334. 



Nerita diversicolor. Martyn Univ. Conch, t. 108. ? 



Nerita, &c. Chemnitz, v. p. 297- 1. 191. f. 1956 and 1957. 

 Inhabits the coasts of the island of Ascension. Chemnitz. 

 Shell an inch and a half long, and about equally broad, of a 



