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 Weritina fluviatilis, inhabiting Great Britain. 
These are, among the Helicide, 1. Succinea, Drap., including two 
species; 2. Vitrina, Drap., four species, one of which is new, anda 
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 : tentacula inferiora brevissima. Testa oblonga 
** seu elongata; anfractu ultimo majore ; apex acutiusculus: columella 
“* subinterrupta; apertura canaliculata, ad basin subeffusa, marginibus 
“* inequalissimis: wmbilicus nullus;’? in it are included three species, 
the Helix lubrica, Mill., the Buccinum Aciculu, Mill., and the Cion. 
elongata, ( Helix octona, (3., Gmel.) ; 6. Clausilia, Drap., seven species; 
7. Pupa, Drap., three species; 8. ALaa, ‘ Animal tentaculis inferio- 
‘* ribus punctiformibus. Testa veré cylindrica: apertura intus denticu- 
*« lis sive lamellis incontinuis munita, marginibus subequalibus ; peristo- 
** mio simplici ;” to this group are referred the Turbo Muscorum, Linn., 
the Turbo sex-dentatus, Mont., the Turbo Offtonensis, Shepp.?, and 
three other species; 9. Vertigo, Miill., including two species. Among 
the Carychiade are, 10. Cyclostoma, Drar , including two species; 11. 
Carychium, Mill., three species, one of which is the Turbo tridens, 
Mont.; 12. Auricula, Drap., of which four speciesare distinguished. The 
Limneade include, 13. Limneus, Drap., ten species, among which, 
however, is placed the Assiminia Grayana, Leach; 14. Physa, Drap., 
two species; 15. Planorbis, Mill., thirteen species; and 16. Ancylus, 
Miill., including two species. 
The total number of species described by Mr. Jeffreys is ninety-five. 
