98 Mr. W. H. Benson on new Terrestrial Shells from Ceylon. 



Cyclostomacea. 



Cyclophonis Ceylanicus, Sow. Aulopoma helicinum. 



Menkcanus, Ph. Hotfmeisteri, Trosch., distinct, 



Involvulus, Mull., var. grande, Pfr. 



alabastrinus, Pfr. Cataulus Templemani, Pfr. 



punctatus, Grat. Layardi, Gray. 



Bairdi, Pfr. Eurytrema, Pfr. 



Thwaitesi, Pfr. pyraraidatus, Pfr. 



annulatus, Trosch. Thwaitesi, Pfr. 



loxostoma, Pfr. Austenianus, Bens, 



parapsis, Bens. decorus, Bens. 



Parma, Bens. marginatus, Pfr. 



Cratera, Bens. duplicatus, Pfr. 



Leptopoma halophilum, Bens. aureus, Pj^r. 



orophilum, Bens. Cyclostomus ? gradatus, Pfr. 



flammeum, Pfr. Pterocyelosrupestris,Bews., var. pieta, 



eonulus, Pfr. Trosch. 



semiclausum, Pfr. Cumingi, Pfr. 



poecilum, Pfr. Cingalensis, Bens. 



elatura, Pfr. — — Troseheli, Bens. 



apicatum, Bens. bifrons, Pfr. 



Aulopoma Itieri, Grat. [117 Laml Shells.] 



Note. — Cyclophorus stenostoma, Sow. and Pterocyclos bilabiatus, Sow., 

 have lately been sent to me as from Ceylon, without any definite locality. 

 They are both Nilgherry shells, and I consider their Cingalese habitat so 

 doubtful, that I have not introduced them in my list. 



The Vitrince of Ceylon have an Indian aspect. A membra- 

 naceous species also occurs in South India. 



The most characteristic form of Helix is that of H, Waltoni 

 and Skinneri. 



A considerable number of Cingalese Helices are of the vitrini- 

 form type, well represented in the Nilgherries by small species, 

 and by larger "forms even to a considerable height in the 

 Himalaya, and throughout Hindostan. 



Several species are common to Hindostan (especially the Pen- 

 insula) and Ceylon. 



The group, H. Rivolii, erronea, and Charpentierij is -repre- 

 sented, on the east side of the Bay of Bengal, by H. rejuga, 

 Gould, and Achatina, Gray. 



The Streptaxes are nearly allied to the Nilgherry species. 



Pupa Ceylanica is closely allied to the North Indian P. bicolor, 

 Hutton, both belonging to the type Ennea, Ad. 



Some of the Bulimi are Indian in type, others approach the 

 Philippine forms. 



The Achatincs are of a type well represented in the Nilgherries, 

 and to which belong species from the Mahabaleshwur hills, 

 Bombay, Central India, Lower Bengal, Sikkim, and the Khasya 

 range. 



