* 134 JOURNAL, R.A.S. (CEYLON). [VOL. XVI. 



4. — H. cingalensis should be H. emiliana, Pfr. (synonym). 



8. — Ernstia asp trans should be Kaliella salicensis, 

 Godwin-Austen. 



9. — Microcystis suavis should be M. Thwaitesii, Pfr. 



10. — -M. Thwaitesii should be M. circumsculpta, Sykes 

 in. sp.). 



36. — Jerdonia ceylanica should be Cyathopoma leptomita, 

 Sykes (n. sp.). 



Fam. Helicid^. 

 39. — Acavus superba, Pfr. 



I have at length been successful in getting specimens of 

 the true Superba of Pfeiffer. It is a magnificent shell. For 

 some curious reason this shell appears never to have been 

 correctly figured. 



In Reeve's Helix, as well as in the Conch. Indica, the red- 

 lipped variety is figured as the type. The shell is pinkish- 

 brown all over, and the peristome, which is white, has a 

 pale chestnut margin. Like the other forms of Acavus, it is 

 always coated with a green lichenous growth when full 

 grown. 



The animal is exactly similar in appearance to that of A. 

 roseolabiata described in my former Paper. 



Bab. — High up on the trunks of trees in damp localities. 

 Lower Ambagamuwa, 2,000 ft. 



40. — A. grevillei, Pfr. 



This is very near the last species. The shell is darker and 

 more malleated, and the peristome is dark purple. The 

 animal is similar in appearance to those of A. superba and 

 A. roseolabiata. 



The three forms may prove to belong to a single species 

 as Pilsbry has suggested (Manual of Gonchology, series II., 

 vol. VI.). 



Hob. — The same as A. superba* 



* Mr. Martin Woodward, of the Royal College of Science, S. Kensington, 

 has kindly undertaken the anatomical examination of a large series of 

 animals of Acavus. The result is likely to be of great interest. 



