Testaceous Pneumonobranchous Mollusca of Great Britain." 509 



.15 bis. rufilabris. Jeffreys. 



Animal testaceum aut griseum, supern^ croceo-verru- 



cosum. Tentacula longa flexilia. 

 Testa subdepressa, subglobosa, glabra, nitidiuscula, cro- 

 ceo-pallescens. A nfraclus 5 — 6. Apertura subro- 

 tundo-lunata, margine rufo, limboque ssepfe eburneo 

 instructa. 



Long. 0.25. — Diam. 0.5. 



H. Carthusiana. Miiller. 



H. Carthusianella. Drap. p. 10l.pl. vi./. 31, 32. FSr. 47. 



Var. a. minor, convexior. 



H. (Helicella) Olivieri. F&. p. 47. 



Mr. J. F. Stephens (who presented me with specimens) says 

 he found it many years ago in great abundance about Dover ; 

 and subsequently at Brighton and other parts of that line of 

 coast. Little Hampton, Sussex : Mr. J. E. Gray. 



Dr. Leach, in his admirable (though as yet inedited) work 

 on the British Mollusca, says that " Mr. Gibbs discovered 

 this species to be an inhabitant of Britain in 1814, and com- 

 municated it to Montagu, who named it in his MSS. H. 

 Gibhsii." 



It was, I believe, first publicly recorded as British by Baron 

 de F6russac in his Concordance Systematique pour les Mollusques 

 terrestres et flutiatiles de la Grande Bretagne. 



I did not notice this species in the former part of my Synopsis, 



from a supposition (perhaps not altogether unfounded) that it 



had been naturalized in this country by an importation from 



the opposite coast of France. Certain it is that on a late visit 



to Dover, I could not, after a long and strict search, find any 



traces of its having inhabited that neighbourhood. The above 



description of the animal has been taken, faute de mieux, from 



specimens collected by myself in Normandy. 



H. concinna, 



