THE NAUTILUS. 



VOL. XII. MAY, 1898. No. 1. 



NOTES ON SOME LAND AND FRESHWATER SHELLS FROM SUMATRA, 

 WITH DESCRIPTIONS OF NEW SPECIES. 



BY T. H. ALDRICH. 



In the fall of 1890, the writer received from Marang, Sumatra, a 

 small collection of shells made by Win. Doherty, Esq., at that place. 

 A partial list of same is here given, with descriptions of some new 

 forms : 



1. Nanina gemina Busch. 



2. Ariophanta weyersi Smith. 



3. Ariophanta dohertyi Aldrich. 



4. Hemiplecta marangensis n. sp. 



5. Sitala carinifera Stol., var. marangensis n. var. 



6. Trochomorpha dohertyi n. sp. 



7. Amphidromus palacens Busch. 



8. Helicina parva. 



9. Clausilia aenigmatica Sykes. 



10. Cyclophorus eximius Mous. 



11. Cyclophorus perdix Brod. 



12. Orossopoma bathyraphe Smith. 



13. Lagocheilus marangensis n. sp. 



14. Omphalotropis (Selenom])hala~) dohertyi n. sp. 



15. Diplommatina liwaensis n. sp. 



16. Leptopoma fultoni n.sp. 



17. Cyclotas sp. 



18. Melania lirata Bens. 



19. Melania artecava Mouss. 



