CYCLOTACEA. 261 



var. major. 



7 Khasi Hills ; coll. Major H. IJ. Godwin-Austen. 



var. arakanensis, Bianf. 



2 Akyab (typical of the var.); coll. W. T. Blanford, Esq. 

 10 Chittagong ; coll. H. Raban, Esq. 



3. Pterocyclus magnUS, Godwin- Austen. 



The compressed last whorl, which is semi-detaqhed at the 

 proportionately smaller aperture, the more open umbilicus and 

 the different character of the "tube," distinguish this form from 

 the large variety of the preceding. It is, I think, doubtfully 

 more than a well denned variety. 



1 Dihiri, Dana Hills ; coll. Major H. H. Godwin- Austen. 



4. Pterocyclus cumingi, Pfeiffer. 



4 Ceylon; coll. E. L. Layard, Esq. (As. Soc., Bengal). 



2 Ceylon ; coll. H. Nevill, Esq. 



7 Ceylon ; ex c. Dr. F. Stoliczka. 



var. trOSCheli, Bens. (P. troscheli, fide H. Nevill). 

 A small, compressed variety. 

 2 Ceylon; coll. G. Nevill, Esq. 



var. 



1 Travancore ; ex c. Dr. F. Stoliczka. 



5. Pterocyclus cingalensis, Benson. 



Exceeding close to the preceding, but perhaps separable. 



2 Ceylon; coll. H. Nevill, Esq. 



6. Pterocyclus bifrons, Pfeiffer. 



1 Ceylon; coll. H. Nevill, Esq. 



7. Pterocyclus insignis, Theobald. 



1 Shan States ; ex c. W. T. Blanford, Esq. 



2 Loc. ? ; ex c. Dr. F. Stoliczka. 



var. planorbioides. 



The spire is actually sunken in this remarkable Planorbis- 

 like form : the last whorl is more compressed : the aperture 

 smaller ; and the umbilicus more open and shallow than in the 

 type form. The excavated suture is common to both. 



3 Kakhyen Hills ; coll. Dr. J. Anderson. 



