262 Analytical Notices of Books. 



was made towards the modern views by indicating the genera of Drapar- 

 naud and Lamarck as constituting natural sections of the Linnean genera. 

 In Mr. Jeffreys' paper, on the contrary, the modern groups are throughout 

 employed as substantive genera ; and to these are added two other groups 

 which the authour has deemed it right to distinguish generically, making 

 in the whole no less than sixteen genera of land and fresh-water Mol- 

 lusca, exclusive of the Xeritina Jluviatilis, inhabiting Great Britain. 

 These are, among the HeliddcB, 1. Succinea, Drap., including two 

 species; 2. Vitrina, Drap., four species, one of which is new, and a 

 second now first indicated as distinct ; 3. Helix, Auct., including, with 

 all its dismemberments, no less than twenty-nine species, among which, 

 however, is enumerated, as the Helix acuta, the Carocolla lapicida, 

 Lam., the only British type of another genus; 4. Bulimus, Brug., three 

 species; 5. Cionella, a new genus, which is thus characterized, 

 " Animal glutinosum : tentacida inferior a brevissima. Testa oblonga 

 " seu elongata; anfraetu ultimo majore ; apex acutiusculus : columella 

 " subinterrupta ; apertura canaliculata, ad basin subeffusa, marginibus 

 " insequalissimis : iimhilicus nuUus;" in it are included three species, 

 the Helix lubrica, Miill., the Bucclnum Acicula, Miill., and the Cion. 

 elongata, (Helix octona, (j., Gmel.) ; 6. Clausilia, Drap., seven species; 

 7. Puj)a, Drap., three species; 8. Al^a, ^' Animal tentaculis inferio- 

 " n6«s punctiformibus. Tesia vere cylindtica: aperiura intus denticu- 

 " lis sive lamellis incontinuis munita, marginibus subsequahbus ; pcristo- 

 " mio simplici ;" to this group are referred the Turbo Museorum, Linn., 

 the Turbo sex-dentatus, Mont., the Turbo Offtonensis, Shepp.?, and 

 three other species ; 9. Vertigo, Miill., including two species. Among 

 the Cari/chiadcs are, 10. CycZosfoma, Drap., including two species; 11. 

 Curychinm, Miill., three species, one of which is the Turbo tridens, 

 Mont.; 12. Auricula, Drap., of which four species are distinguished. The 

 LimncEadcB include, 13. Limnceus, Drap., ten species, among which, 

 however, is placed the Assiminia Grayana, Leach; 14. Physa, Drap., 

 two species; 15. Planorbis, Miill., thirteen species; and 16. Ancylus, 

 Miill., including two species. 



The total number of species described by Mr. Jeffreys is ninety-five. 



