520 Mr. Jeffreys's Supplement to the " Synopsis of 



This section of Limneus belongs to M. Risso's genus Leachia, 

 and the Stagnicolu of Dr. Leach. 



L. communis, p. 376. 



Var. a. magis elongata, labro intils vix reflexo. Dorking, 

 Surry : Mr. Stutchbury. 



Var. )8. minor, testacei coloris, truncatulo affinis. 



L. fuscus. Ffeiffer i. 92. Taf. iv.fig. 25 ? 

 Common in marshes along the banks of the Thames from 

 Battersea to Woolwich. The gradation from one to another of 

 the different species of European Limnei is so very slight, that 

 unless, as M. Blainville once expressed to me, the stagnalis, 

 palustris and pereger are excepted, there would properly be 

 no species at all. 



L. elongatus, p. 376. 



Ireland (Rev. James Bui wer); Scarborough (Mr. Bean) ; and 

 Norfolk (Dr. Leach); Rev. Dr. Goodall. 



L. Grayanus, p. 378. 

 does not belong to the Pulmonobranchia ; but (on account of 

 its animal) would form a curious anomaly in Ferussac's sub- 

 genus Paludina of the genus of the same name. In the form of 

 the shell it approaches to some of the smaller Melania. 



L. detritus, p. 378. 



I have seen Dr. Turton's specimens of his Helix detrita, 

 which are a true Bulimus, and very different from the above 

 species. Dr. Pulteney's cabinet in the Linnean Society's mu- 

 seum contains several ; but I did not observe any appearance 

 of bands. It is, however, a very doubtful species both as to its 

 habitat and locality. Ferussac refers it without a doubt to a 

 variety of the Bulimus radiatus of Draparnaud. 



Physa. 



