Though in this specimen the ribs are more conspicuous, than in the preceding species, 

 which ought to be the contrary, the characters of the aperture are those of ocellata viz. a nearly 

 smooth pillar lip, with very small teeth on its margin. As v. Martens (I.e. p. 96) mentions also 

 intermediate specimens, I should incline to the opinion that N. ocellata has only varietal rank. 



Neritina Lamarck. 



I. Neritina (Neritaea) ajirictdata Lamarck. . 



Lamarck. Encyclop. Methodique. Vers. II, PI. 455, fig. 6. 



Animaux s. vert. Ed. Desh. Vol. VIII, p. 572. 



V. Martens. Martini-Chemn. Conch. Cab. Ed. II, Neritina, p. 30, PI. 6, fig. 13 — 15, 24 — 27. 

 Weber, Zool. Ergebn. Band IV. SUss- u. Brackw. Moll. p. ^6. 



Stat. 33. River near Pidjot, Lombok. 4 Spec. 



Three of the specimens are very young and scarcely recognizable. As far as I know, 

 this species has not yet been recorded from Lombok. 



*2. Neritina (Neritaea) bicanalimlata Recluz. 



Recluz. Journ. de Conch. Vol. I, 1850, p. 145. 



Reeve. Conch. Ic. Vol. IX, Neritina, fig. 79. 



v. Martens. Martini-Chemn. Conch. Cab. Ed. II, Neritina, p. 35, PL 9, fig. 3, 4. 



*Java. 2 Spec. 

 This species was only recorded from the Philippines, the largest specimen is very characteristic. 



3. Neritina (Neritaea) crepidularia Lamarck, var. exaltata Recluz. 



Recluz. Journ. de Conch. Vol. I, 1850, p. 65, PL 3, fig. 3. 



v. Martens. Martini-Chemn. Conch. Cab. Ed. II, Neritina, p. 44, PL 7, fig. i, 2. 



Stat. 71. Near Makassar, i Spec. 



4. Neritina (Neritaea) pulligera Linne. 



LiNNE. Syst. Nat. Ed. XII, p. 1253. 



Rumph. Amb. Rariteitkamer, p. ^6, PI. 22, fig. H. 



V. Martens. Martini-Chemn. Conch. Cab. Ed. II, Neritina, p. 49, PL i, fig. 4, 5. 



Weber, Zool. Ergebn. Band IV. Siiss- u. Brackw. Moll. p. -jf. 



Stat. 82. Batu Pangal, Mahakkam-river; Borneo, i Spec. . 

 Stat. 131. Beo, Karakelang-islands; shore. 19 Spec. 



*var. sumatrana Dautzenberg. 



Dautzenberg. Contribution a la Faune Mai. de Sumatra. Ann. Soc. Mai. Belg. Tom. XXXIV, 

 p. 23, PL I, fig. 12. 



*Java. 13 Spec. 

 The specimens from Java, perfectly agree with those from Sumatra and with the description 

 of Dautzenberg. If the locality "Java" be correct, it is a new addition to the fauna of that island. 



9 



SIKOGA-EXPEDITIE XLIX' «. 2 



