74 PKOCEEDINGS OP THE MALACOLOGICAL SOCIETY. 



obtuso ; eutura profunda ; anfi*. 4^, convexi, ultimiis versus aperturam. 

 parum descendens ; apertura fere circularis, duplex, internum con- 

 tinuum, externum leviter expansum. Alt. 5"5, diam. max. 10-5 mm. 



Sab. — Nuwara-Eliya (Mrs. Broun). 



A specimen of this very interesting form was collected by 

 Mrs. Broun, and given by her to Mr. Preston, who has placed it 

 in my hands for description. It is noteworthy for its thick, rough 

 periostracum, which forms distant radiating ridges, in addition to the 

 spiral striation, common to so many of these forms. No other species 

 described from Ceylon appears to really approach it. 



EXPLANATION OF PLATE V. 



Fig. 1. Glessula Collettcs, n.sp. 



2, 3. Cyclophorus [Scabrinus) JBrounce, n.sp. 



4. Opeas Prestoni, n.sp. 



5, 6. Euplecta prweminens, n.sp. 



7. Kaliella delectabilis, n.sp. 



8. Cyathopoma lepfomita, n.sp. 

 8a. ■ (operculum). 



9. Dtplommatina [Nicida) catathymia, n.sp. 

 10, 11. Microcystina lita, n.STp. 



12. Sitala operiens, n.sp. 



13, 14. Plectopylis {Sykesia) clathratula, v. compressa, n.var. 



15. Cataulus Colletti, n.sp. 



16. Nevilli, n.sp. 



17. 18. Thysanota (P) eumita, n.sp. 

 19, 20. Sitala pyramidalis, n.sp. 

 21, 22. Flectopylis [Sykesia) ealiginosa, n.sp. 



