RIJKS MUSEUM VAN NATUURLIJKE HISTORIE ^ LEIDEN. 19 



Fam. Neritilidae. 



Neritilia v. Martens. 



1. Neritilia rubida Pease. 



Pease. Proc. Zool. Soc. London, 1865. p. 514. Pease. American Journ. of Conch. 

 Vol. III, p. 285, PI. 24, fig. 5. v. Martens. Martini-Chemn. Conch. Cab Ed. II, 

 Mon. Neritina, p. 244, PL 23, fig. 19, 20. Schepman. Siboga-Expeditie, Proso- 

 branchia, Rhipidoglos£a, p. 14, PI. 8. lig. 5 (Radula). 



Branch of the Mbai-river near Hollandia. 



This genus, for which I have erected (1. c.) a new family, on account 

 of its quite different radula and operculum, has not yet been reported 

 from IS". Guinea. Unfortunately, I have left (1. c.) by error the genus Septaria 

 under this head, it belongs to the true Neritidae. Several specimens have 

 been collected, fully agreeing with specimens from other localities. 



II. MARINE MOLLUSCA. 



A few marine mollusca have been collected, but as the majority 

 belongs to well-known species, and I was unable to identify three of 

 them, whilst it is impossible to get them named by comparison, (war 

 prevented me from having them compared in the British Museum), the 

 lot has but little interest. 



Prosobranchia. 



Rhachiglossa. 



Fam. Mi tri da e. 



Turricula Klein. 



1. Turricula sp. 



Kajo-bay, under stones between high- and low- watermark. 



This species I could not identify, the more so as it appears to be 

 young; it is smooth, greyish-black, with two dark spiral lines, one at 

 the periphery, the other below it. Length 9 mill. 



Taenioglossa. 



Fam. Cypraeidae. 



Cypraea Linné. 



1. Cypraea annulus Linné. 



Linné. Syst. Nat. Ed. X, p. 723. Reeve. Conch. Ic. ; Cypraea, fig. 71. 



Kajo-bay, under stones between high- and low-watermark. 



