250 Mr. E. A. Smith and Col. H. W. Feilden on 



3*. Helix {Dentellaria) Isabella^ F^russac. 



Helix (Helicogena) Isabella, F^russac, Prodrom. p. 36, no. 87 ; id. Hist. 



nat. Moll. pi. xlvii. figs. 2. 

 Helix isahella, Pfeiffer, Concli.-Cab. ed. 2, p. 76, pi. x. figs. 1, 2 ; Reeve, 



Conch. Icon, fig. 249, 



" This species is spread throughout the island in gullies and 

 cool damp places. The finest and handsomest specimens 

 were found in Turners Hall Wood, the only piece of primaeval 

 forest left in the island. They were found in May under 

 fallen fronds of the cabbage-palm, which kept the ground 

 damp." {Feilden.) 



This species is recorded by M. Drouet f from Cayenne, 

 French Guiana, where it was collected in company with its 

 near ally, H. dentiens, F^russac, by Lieutenant Charles 

 Eyries. The latter also occurs at Martinique, Guadeloupe, 

 and Dominica ; and it is therefore rather curious that the 

 present form appears to extend only to this one island of the 

 Lesser Antilles. Deshayes regarded it merely as a variety 

 of H. dentiens^ and at one time one of the authors held the 

 same view, but is now of opinion that they may be conve- 

 niently separated. 



4*. Helix [Fruticicola] similaris^ F^russac. 



Helix similaris, Reeve, Conch. Icon, tigs. 149 a, h ; Pfeiffer, Conch. - 

 Cab, ed, 2, pi. Ix. figs, 1.3-16, 



" This cosmopolitan species is the commonest Helix in the 

 island, and is found plentifully under stones, and also after 

 rain crawling on the grass. It is abundant on the lowlands 

 as well as on the high ground of Scotland district, at an eleva- 

 tion of 1000 feet and more." {Feilden.) 



Tryon J states that " this species inhabits the cofFee-tree, 

 and commerce has spread it all over the world, wherever coffee 

 is cultivated." This may be the case ; but, as far as we can 

 discover, it has at present only been recorded from one of the 

 coffee-growing West- Indian Islands, namely Cuba, where it 

 M as collected by Hang § many years ago. This, however, 

 is doubted by Pfeiffer ||, and its occurrence there still wants 

 confirmation. Another fact in opposition to Mr. Tryon's 

 theory is its presence in the island of Ascension, where coffee 

 is not grown. 



It has been collected in several parts of Brazil, but appa- 

 rently not further north than Bahia. 



t ' Essai Moll, terrest, fluv, Guyane fran?.,' par H, Drouet, 1859, p. 54, 



X Man. Conch, ser. 2, vol. iii. p. 205. 



§ Ann. Sc. Nat. (1) vol. xxiv. p. 15. 



I! Conch.-Cab, ed. 2, pp. 341, 342 {Helix). 



