io. Nerita (Cymostyla) Spengleriana Recluz. 



Recluz. Proc. Zool. Soc. Lond. 1843, p. 201. 



Reeve. Conch. Ie. Vol. IX, Nerita, fig. 47 (oleagina). 



V. Martens. Martini-Chemn. Conch. Cab. Ed. II, Nerita, p. 39, PJ. 7, fig. 6, 7. 



Stat. 16. Bay of Kankamaraan, South coast of Kangeang. 22 M. | Spec. 



Stat. 51. Madura-bay. Reef. 1 Spec. 



Stat. 142. Laiwui, coast of Obi Major. Reef. 1 Spec. 



Stat. 165. N. E. side of Daram-island. East coast of Misool. Reef. 2 Spec. 



Stat. 296. Noimini, South coast of Timor. Reef. 1 Spec. 



Stat. 299. Buka-bay, South coast of Rotti-island. Reef. 1 Spec. 

 *Java. 2 Spec. 



1 1 . Nerita (Cymostyla) striata Burrow. 



Burrow. Elements of Conch. p. 172, PI. 20, fig. 8. 



Reeve. Conch. Ie. Vol. IX, Nerita, fig. 18 (chrysostoma). 



V. Martens. Martini-Chemn. Conch. Cab. Ed. II, Nerita, p. 37, PI. 7, fig. 1 — 5. 



Stat. 131. Beo, Karakelang-islands. 13 M. 7 Spec. 



12. Nerita (Cymostyla) Jïammiclata Recluz. 



Recluz. Revue Zool. 1841, p. 180. 



v. Martens. Martini-Chemn. Conch. Cab. Ed. II, Nerita, p. 46, PI. 7, fig. 13, 14. 



Stat. 86. Dongala, Palos-bay, Celebes. Reef. 2 Spec. 

 Stat. 131. Beo, Karakelang-islands. 13 M. 16 Spec. 



The specimens are darker than that figured by v. Martens. Most of them show obviously 

 the alternating larger and narrower concentric ribs. 



13. Nerita (Pila) plicata Linné. 



LlNNÉ. Syst. Nat. Ed. X, p. 779, N° 642. 



RUMPH. Amb. Rariteitkamer, p. 78, Spec. VI [l'alvata sulcata albcï). 



REEVE. Conch. Ie. Vol. IX, Nerita, fig. 42. 



v. Martens. Martini-Chemn. Conch Cab. Ed. II, Nerita, p. 63, PI. 10, fig. 6 — 10. 



Stat. 16. Bay of Kankamaraan, South coast of Kangeang. 22 M. 1 Spec. 



Stat. 33. Bay of Pidjot, Lombok. 22 M. 1 Spec. 



Stat. 50. Bay of Badjo, West coast of Flores. Shore. 1 Spec. 



Stat. 51. Madura-bay. Reef. 8 Spec. 



Stat. 64. Kambaragi-bay, Tanah-Djampeah. Reef. 3 Spec. 



Stat. 129. Kawio- and Kamboling-islands, Karkaralong-group. 23 — 31 M. 1 Spec. 



Stat. 131. Beo; Karakelang-islands. 13 M. 1 Spec. 



Stat. 165. North E. side of Daram-island, E. coast of Misool. Reef. 1 Spec. 



Stat. 279. Roma. Reef. 1 Spec. 



Stat. 296. Noimini, South coast of Timor. Reef. 2 Spec. 



Stat. 301. Pepela-bay, East coast of Rotti-island. Reef. 2 Spec. 



*Java. 9 Spec. 

 *Amboina. 2 Spec. 



Only the specimen from Stat. 1 3 1 and one from Java, have regular black spots, arranged 



6 



