NO. 48. — 1897.] CEYLON MALACOLOGY. 



21 



The operculum of this, and of the other species of th© 

 genus, consists of a flat horny disc separable into many plates. 

 These plates increase in number as the animal grows older. 

 The operculum of young specimens consists of a single film, 

 thin and transparent. 



Habitat in heavy forest, beneath decaying leaves. 



38.— C. Nietneri, Nevill. 



This species is not common in Ambagamuwa. It is the 

 most aberrant species of its genus, and is itself very variable 

 in size and contour. 



It is gregarious, being sometimes found in numbers of a 

 dozen specimens ; but it is extremely local, and only occurs 

 in certain favoured localities, which are sometimes only a 

 few square yards in area. The animal is very dark green, 

 visible through the straw-coloured shell, to which it gives a 

 very pretty appearance. 



Habitat in low brushwood and among ferns in swampy 

 places. The figure given of this species in the Gonchologia 

 Indica is poor and misleading. 



List of identified Mollusca from Ambagamuwa. 



1. Helix similaris 



2. H. acuducta 



3. H. hyphasma 



4. H. cingalensis 



5. H. chenui 



6. H. ceylanica 



7. H. semidecussata ... 



8. E. aspirans 



9. M. suavis 



10. M. Thwaitesii ... 



11. M. partita 



12. M. politissima 



13. M. carneola 



14. C. erronea 



15. C. fryse 



16. C. Beddomeae 



17. P. clathratula 



18. A. Waltoni 



19. A. superba 



20. Glessula inornata 



Fer. 



21. 



Bens. 



22. 



Pfr. 



23. 



Bens. 



24. 



Pfr. 



25. 



Pfr. 



26. 



Pfr. 



27. 



Blanf. 



28. 



Jouss. 





Pfr. 



29, 



Pfr. 



30. 



Pfr. 



31. 



Pfr. 



32. 



Albers. 



33. 



Gude. 



34. 



Hanley. 



35. 



Pfr. 





Rve. 



36. 



Pfr. 



37. 



Pfr. 



38. 



G. niteus ... Gray. 



G. parabilis ..« Bens. 

 Opeas gracilis ... Hutt. 

 Bulimus intermedins Pfr. 

 Phengus Simoni ... Jouss. 

 Ptercyclos Cumingii Pfr. 

 Aulopoma helicinum Chemn 

 Oyclophorus annula- 



tus ... Trosch, 



C. Bairdii ... Pfr. 



C. ceylanicus ... Pfr. 

 C Jerdoni ... Bens. 

 C. cratera ... Bens. 



C. subplicatns ... Bedd. 

 C. Layardi ... H.Adams 

 Leptopoma orophi- 



lum ... Bens. 



J erdonia ceylanica Bedd. 

 Cataulus Blanfordi Dohrn. 



C. Nietnei 



Nevill. 



I have placed specimens of almost all of the above in the 

 collection of the Colombo Museum. 



