Retnarks on British Land and Fresh-water Shells, 427 



Pupa britaiiniea, as I have lately ascertained from living 

 specimens, is furnished with four. The shell in question in 

 the Lamarckian arrangement agrees best with the genus Pupa, 

 and the specific appellation is untenable, and another neces- 

 sary, not only to distinguish it from the P. tridens of La- 

 marck, but to correct an error with regard to the number of 

 its teeth, which, in reality, are five. The appellation P. 

 quinquedentata might have served, if some other species of 

 this genus were not also furnished with five teeth. As there 

 is already a Pupa germanica, the specific name I have 

 adopted appears to be as little exceptionable as any other, 

 particularly if the shell be not really found out of this 

 country. Should the Baron de Ferussac have noticed this 

 shell by any other name, of course it will have the prefer- 

 ence, as I am inimical to useless changes in nomenclature. 

 There is no necessity for the adoption of the new-fangled 

 genus Azeca. If Dr. Fleming considered he would be doing 

 nature too much violence by placing this shell amongst his 

 Pupae, he might have found an unobjectionable receptacle in 

 the genus Chondrus, established by Baron Cuvier, 



Pupa muscorum, — This is much confused. There are 

 three shells described by conchologists under this name and 

 that of Turbo /wuscorum {j^g. 183. o p q), all referring to 

 Linnaeus ; and Donovan has figured a fourth species, as his 

 Turbo wuscorum {Jig. 183. r). 



'tielix fiisca^ Turton, &c. {fig. IS^.s). — Dr. Fleming sus- 

 pects this to be the H. fulva of MuUer. The English shell is 

 about half an inch in diameter, whilst the figure of that of 

 Muller, given by Draparnaud, if I recollect rightly, is little 

 more than a line. 



184 



m ^ 



bb 



Helix sylvatica{Jig. IS^.t). — Is this British, and under what 

 name has it been described ? Is it the H. lucorum of Dillwyn? 



Yielix carthusianella {u). — I suspect this to be the HqYvk. 

 cantiana of authors {v)^ the H. pallida of Donovan: 



G G 2 



