PROCEEDIX^GS OF THE CONCHOLOGICAL SOCIETY. 59 



The name Hyalinia has been adopted as the most suit- 

 able name for the genus hitherto known as Zonites. It has been 

 suggested that this name has too great a similarity to that of 

 Hyalina and Hyalimis which are used for other genera or in 

 other departments of zoology, but we are of opinion that the 

 names are sufficiently distinct to avoid any confusion. 



H. draparnaldi is introduced amongst the British 

 Hyalinia ; it is closely allied to and has been confounded with 

 H. cellaria, of which species Jeffreys would seem at one time to 

 have regarded it as his var. compacta. 



H. glabra. — The real identity of the shell known under 

 this name in England is not yet established beyond doubt, the 

 leading continental conchologists, whom we have consulted on 

 the question, differing very widely in their views, and we have 

 not yet been able to obtain living continental specimens for 

 comparison. 



Hyalinia petronella is tentatively included in the list 

 on the strength of a specimen or specimens found by Mr. 

 Rogers in Cheshire, and which are now in the collection of Mr. 

 Ponsonby, and in the hope that the publication of this discovery 

 may lead to further investigation. 



Fitzinger's name Vitrea is accepted to indicate sub- 

 generically 11. crystallina in the same sense in which it appears 

 to have been used by its author. 



The term Conulus proposed at the same time for H. fulva 

 is also used here in a similar way. 



H. nitida and excavata form the group Zonitoides, in- 

 teresting as being the only British Hyalinia possessing love-darts. 



The s.g. Punctum has been 2Ao'^\.t^{ox Helix pygmcea, 

 with the object of emphasizing the peculiarity in the jaw, which 

 instead of being formed of a single piece as in the majority of the 

 Helicidse, is composed of a number of separate plates — as in the 

 Orthalicidse, with which group Morse and Bmney united Punctum 

 for this reason. 



