996 NERITA. 



LARVA. 40. Shell sub-globular, smooth, with the 

 summit very obtuse, and the inner lip very 

 slightly denticulated. 



Nerita Larva. Chemnitz, v. p. 323. 1. 193. f. 2017. Gme- 

 lin, p. 3679« Schreibers Conch, i. p. 331. 



Nerita, No. 1 19. Schroeter Einl. ii. p. 340. 



Rumphius, t. 22. f. No. 6. Petiver Amh. t. 1 1. f. 22. 

 Inhabits the coasts of Amboyna. Rumphius. 

 N. Larva appears by the figures to be about three-quarters of 



an inch long, and nearly equally broad, of a whitish colour, 



with two or three broad yellowish brown transverse bands. 



Chemnitz has quoted La Nuancee of Favanne, ii. p. 229, 



but that shell appears by the description to be somewhat 



ribbed transversely. 



ATRATA. 41. Shell smooth, black, and the aper- 

 ture white ; outer lip striated, and the inner 

 margin slightly toothed; inner lip concave, 

 wrinkled, and the margin denticulated. 



Nerita atrata. Chemnitz, \. p. 296. 1. 190. f. 1954 and 1955. 



Gmelin, p. 3683. 

 Nerita Senegalensis. Gmelin, p. 3686. 

 Nerita, No. 100. Schroeter Einl. ii. p. 334. 

 Le Dunar. Adanson Senegal, p. 188. t. 13. f. 1. Favanne, 



ii. p. 209. t. 70. f. F 1, and F2. 

 Inhabits the coasts of the West India Islands. Chemnitz. 



Goree. Adanson. 

 The largest and smallest diameters of this shell, when mea- 

 sured obliquely, are about thirteen and ten lines ; it is mi- 

 nutely striated transversely, and of an uniform very black 

 colour, except the aperture, which is white ; the summit 

 when decorticated, as it often occurs, is also white. Le 

 Dunar of Adanson appears to be this shell ; and it has also 

 been figured by Martyn in the Universal Conchology, but I 

 cannot ascertain the number of his plate. 



NIGERRIMA. 42. Shell sub-globular, smooth, thick, 

 opake, and minutely striated transversely ; 

 outer lip entire, and the inner lip slightly 

 wrinkled. 



Nerita nigerrima. Chemnitz , v. p. SOQ, 1. 192. f. 1985 and 

 1986. 



