984 NERITA. 



Nerita parva. Chemnitz^ v. p. 271. t. 188. f. 1917 and 



1918. 

 Nerita, No. 17- Schroeter Einl. ii. p. 310. 



Inhabits the coasts of Morocco. Chemnitz. 



This shell appears, by the figures, to be about seven lines long 

 and six broad, and as well as many other of the sub-globular 

 umbilicated species, is principally distinguished by its co- 

 lours. 



ALBUMEN. 16. Shell depressed, with the umbilicus 

 somewhat heart-shaped, and nearly filled by 

 a flattened callus. 



Nerita Albumen. hiniKEUs Syst. Nat. p. 1252. Born 



Mils. p. 399. Chemnitz, v. p. 276. 1. 189. f. 1924 and 



1925. Schroeter Einl. ii. p. 281. t. 4. f. 13. Gmelin, 



p. 3671. Schreibers Conch, i. p. 31 6. 



Le Jaune d'CEuf aplati, ou le Pain d'Epice. Favanne, ii. 



p. 283. t. 11. f. H 1. . 

 Ritmphius, t. 22. f. B. Petiver Amb. 1. 10. f. 14. Seba, 

 iii. t. 4i. f. 9 to 11. 

 Inhabits the coasts of Amboyna. llumphius. Isle of France. 

 Favanne. Nicobar and Molucca Islands. Chemnitz. Bar- 

 bary, and the Cape of Good Hope. Gmelin. 

 Shell much depressed, and the base measures about an inch 

 and three-quarters, by an inch and a half; the upper side is 

 convex, and of a buff or sometimes of a liver colour, and the 

 luider side is flat and white ; the umbilicus is semi-heart- 

 shaped and very large, and is almost closed by a broad flat- 

 tened callus. 



MAMMILLA. 17. Shell ovate, glabrous, with the 

 umbilicus closed, and the aperture ovate. 



Nerita Mammilla. Finn&us Syst. Nat. p. 1252. Born 

 Mns. p. 399. Schroeter Einl. ii. p. 282. Gmelin, p, 

 3672. Schreibers Conch, i. p. 316. 

 Variety A. White with the umbilicus closed, and the outer 



lip acute. 



Nerita Mammilla. Chemnitz, v. p. 280. t. 189. f. 1928 to 

 1931. 



Le vrai Mammelon, ou Teton blanc de Venus. Favanne, 

 ii. p. 288. 1. 11. f. H 2. 



Lister Conch, t. 571. f. 22. Rumphius, t. 22. f. F. Pe- 

 tiver Gaz. t. 152. f. 12, and Amb. t. 11. f. 15. Gualter, 

 t. 67. f. C. Argenville, t. 7. f. X. Seba, iii. t. 41. f. 22. 

 Knorr, i. t. 6. f. 6 and 7. 



