11 



Azeca tridens. Pulteney. 

 Achatina acicula. Midler. 

 Succinea putris. Linneus. 

 Var. gracilis. Alder. 



Succinea Pfeifferi, Rossm. 



Var. intermedia. 

 Succinea oblonga. Draparn. 



FAM. LIV, LIMN/EAD/E. VOL. IV, 139. 



Physa fontinalis. Linneus. 

 Physa hypnorum. Linneus. 

 Planorbis corneus. Linneus. 

 Planorbis albus. Mailer. 

 Planorbis glaber. Jeffreys. 



Planorbis Isevis, Alder. 



Planorbis nautileus. Linneus. 



Planorbis imbricatus, Mutter. 



Planorbis carinatus. Midler. 

 Planorbis marginatus. Drop. 



Var. rhoiubeus. 

 Planorbis vortex. Linneus. 

 Planorbis spirorbis. Linneus. 

 Planorbis contortus. Linneus. 

 Planorbis nitidus. Midler. 

 Planorbis lacustris. Lightfoot. 



Segmentina lineata, Fleming. 



Limneus pereger. Mutter. 

 Var. ovata. 

 Var. lineata. Bean. 



Limneus Burnetti. Alder. 

 Limneus auricularius. Linn. 



Var. acutus. Jeffreys. 

 Limneus stagnalis. Linneus. 



Var. fragilis. 



Limneus truncatulus. Mutter. 

 Limneus glaber. Mutter. 

 Limneus palustris. Linneus. 

 Limneus glutinosus. Mutter. 



Amphipeplea glutinosa, Gray's Manual. 



Limneus involutus. Harvey. 



Amphipeplea involuta, Gray's Manual. 



Ancylus fluviatilis. Mutter. 

 Ancylus oblongus. Lightfoot. 



Ancylus lacustris, Mutter. 

 FAM. LV, AURICULID^. VOL. IV, 190. 



Conovulus bidentatus. Mont. 

 Conovulus albus. Gray's M. 



Conovulus denticulatus. 



Montagu. 



Var. myosotis. Draparnaud. 



Var. ringens. 

 Carychium minimum. Mutter. 



FAM. LVI, CYCLOSTOMID/E. VOL. IV, 200. 



Cyclostoma elegans. Mutter. 

 Acme lineata. Draparnaud. 



Acme fusca, Gray's Manual. 



Omitted. 



P. 8 Xassa incrassata. Mutter. P. 9 Mangelia septangularis. Mont, 

 Additional Species described by J. ft Jeffrey*, Esq., in "Annals of Natural 



History," January, 1858. 



Poromya subtrigona, n. sp. Jeffreys. EulimeUa obeliscus. Jeffreys. 



Diodonta Bai-leei, n. sp. Jeffreys. Amphisphyra globosa.' Milller. 



Odostomia minima, n. sp. Jeffrey*. Buccinum Holbollli. Mutter. 



FREDERIC WILSON, PRINTER, WEYMOUTH. 



