NERITA. 991 



Lister Conch, t. 143. f. 37. Rumphius, 1.22. f.H. Pe- 



tiver Amh. t. 1 1. f. 4. Guaiter, t. 4. f. H H, Seha, iii. 



t. 41. f. 24 to 26. Knorr, vi. 1. 13. f. 3. Geve, t. 23. 



f. 242. Martini Berl. Mag. iv. t. 8. f. 31. Favanne, 



t. 61. f. D 18. 

 Inhabits rivers in India. I.inmciis. Amboyna. Rumphius. 



Otaheite. Chemnitz. 

 Shell about sixteen lines long and thirteen broad, of a blackish, 

 reddish, or brownish olive-colour ; it has two whirls, of 

 which the body-whirl occupies almost the whole shell, and 

 ends in an acute tooth ; the margins of both the lips are 

 tinged with red or brownish yellow. 



ACULEATA. 30. Shell with transverse spinous striae; 

 inner lip flattish, smooth, and slightly toothed 

 at the margin. 



Nerita aculeata. Chemnitz, x. p. 505. t. l69. f. l642. 

 Gmelin, p. 3686. 

 Inhabits rivers in the East Indies. Cheinnitz. 

 This shell appears by the figure to be about ten lines long and 



seven broad ; and is said to be of a blackish colour. 



PUPA. 31. Shell roundish, smooth, of a milk-white 

 colour, witli transverse parallel black striae 

 on the whirls. 



Nerita Pupa. Linnaus Sj/st. Nat. p. 1253. Gmelin f 



p. 3679. 

 Nerita, No. 142. Schroeter Einl. ii. p. 345. 

 Lister Conch, t. 605. f. 31. Petiver Gaz. 1. 15, f. 8. 



Inhabits the coasts of Jamaica. Lister. 



Linnaeus, without any reference, has described this shell to be 

 of the size of N. littoralis, and intermediate between that 

 species and N. Firginea, with the lip very flat, and very mi- 

 nutely toothed at the margin ; colour milk-white, with dis- 

 tant transverse oblique black strice on the whirls. A shell 

 which Lister and Petiver have figured, and which answers 

 this description, is frequently received from the West Indies, 

 and has a yellow aperture. 



BiDENS. 32. Shell smooth, with two teeth on the 

 inner lip. 



Nerita bidens. Lintmus Sj/st. Nat. p. 1254. Gmelin, 

 p. 3679. Schreibers Conch, i. p. 326. 



