Helix interrupta. — Himalayana. 461 



the summer of 1833, when the last of them died. 



Helix interrupta, Bens. 



Hel. testd sinistrorsd, orbiculato-convexd, infra tumidd, umhilicatd, ad 



periphceriam obtuse angulatd, longitudinaliter confertissime 



striatd, suprd striis iuterruptis fasciis transversalibus dispositis ; 



spird apice obtusd ; peristomate tenui acuto. 



Hob. in rupibus urabrosis Sicrigali et prope Gangis ostiorura fluviura 



Jellinghy dictam. 



This shell has been thought to belong to the species called Helix Hi- 

 malayana by Mr. Lea [Hel. lavipes?), but appears to me to be very 

 different when compared with the following characters of a specimen of 

 the latter in my possession. 



Helix Himalayana, Lea. 



Hel. testd sinistrorsd, orbiculato-convexd, longitudinaliter rugosd, 5m- 

 prd interstitiis rugarum corrugatis, infrd transverse rugosulis, 

 tumidd, nmbilicatd : fulvd fasciis plurimis castaneis, majore infra 

 periphceriam ; periphcerid subangulatd ; labro refiexo, alho. 



The spire is less exserted in this species than in Hel. interrupta, the 

 peculiar sculpture of which forms the best distinctive character. 



The angulated periphery in Hel. interrupta shews an approach to 

 Carocolla, the animal of which, I conclude from the silence of ob- 

 servers, differs in nothing from that of Helix ; whereas that of Hel, 

 interrupta differs most materially, the excrements being voided from an 

 opening in the terminal and posterior part of the foot instead of from 

 the foramen commune ! 



The following is a description of the animal taken while I had the live 

 specimens in my possession. 



Tentacula duo superiora elongata capitulis tumidis oculiferis (puncta 

 percipientia gerentibus), duo inferiora capitulis parvis tumidis. Pes 

 elongatus, compressus, marginatus, supra granulatus, apertura terminali 

 anum et membrura carnosum mucorem emittentem continente. 



