62 SYKES : COT.LECTION OF LAND AND FRESH WATER SHELLS 



Alycaeus gibbosulus, stoiiczka. 



With this occurs another form, much less gibbous, and which 

 may belong to a different species, but the specimens before me show 

 considerable variation. 



Alyeaeus kelantanense, n. sp. I'l. iii, figs. 13, 14 



Shell conic, minutely umbilicate, white in colour, the upper 

 whorls often being yellowish, apparently due to the animal within. 

 Sculpture close well marked rib^striae, with microscopic spiral 

 striation intersecting the ribs. AVhorls 5, moderately convex, the last 

 whorl gibbous, and constricted about 2 millim behind the li|), the 

 sculpture being thence much finer and more remote. Aperture sub- 

 circular, lip double, the upper outer margin forming a slight wing where 

 it approaches the last whorl. 



Alt. 3 '8 ; diam. max. 4 millim. 



Opisthostoma laidlawi, Sykcs. 11. iii, figs. 13, 14. 

 Upkthostoiiia laiiUairi, Sykes : Ante, p. 22. 



Georissa monterosatiana, G.-Aust and Neviii. 



Ampullaria perakensis, T)e Morgan. 



Ampullaria ampullaeea, L. 



Vivipara eingulati, Martens. 



Canidea bocourti, Bmt. 



Faunus ater, L. 

 In my view, F. rnvf<iri, Bens., is only a small form. 



Melania variabilis, liens. 

 There are also two other species of Melania, which I am unable 

 to identify. 



Septaria, sp. 



Neritina erepidularia, Lam. 



Neritina zigzag", Lam. 



Unio (Nodularia) ingallsianus, Lea. 



Unio aseia, Bens. 



Identified from the tablet in the British Museum, no doubt that 

 from which Hanley described the species in 1856 (Cat. Rec. Bi\-. Shells 



P- 385-) 



Monoeondylaea ehaperi.De Morgm (?) 



Corbicula, sp. 



