Testaceous Ptieumonobranchous MoUusca of Great Britain." 519 



aperture of a true Auricula; but I have not ventured to break 

 my solitary specimen to examine the internal structure of the 

 spire, which I consider the main test of distinction between that 

 genus and Tornatella conchologically considered. The upper 

 whorls are very small in proportion ; and the last, as usual in 

 the genus, occupies more than two thirds of the entire shell. 



Mr. Clark of Bath, whose well known zeal and industry as a 

 British conchologist is more than equalled by his accuracy, has 

 since informed me that he discovered a specimen some years 

 ago among a parcel of West Indian shells of no great value. 

 This is an interesting fact, and must leave the indigenousness of 

 this species (at present at least) in some doubt. 



The section of Auricula {Conovulus Lam.), to which this be- 

 longs, are all natives of tropical climates. 



LiMNEUS. 



L. glutinosus, p. 371. 



Dr.Goodall possesses specimens in his cabinet marked as from 

 " Scarborough ; Swaffham ; Windermere ; Oxford ; Eton ; and 

 Deal marshes.'' Wittleseamere ; Mr. Stephens. From this latter 

 place I have seen specimens which measure full three quarters 

 of an inch in length. Stanmore, Middlesex ; Mr. G.B.Sowerby. 



L. pereger, p. 374. 



Var. y. Gulnaria lacustris. Leach's British MoUusca 

 {inedited)? Bad. Brit. Mus. 

 The Limnei ovatus, vulgaris and pereger of PfeiiFer, all appear 

 to belong to this species. 



L. major, p. 375. 



Var. )3. Surry and Croydon canal, not uncommon. 



The Physa scaturiginum of Draparnaud, which Dr. Turton 

 has noticed as British in one of the Numbers of the Zoological 

 Journal, is the fry of this species. 



VOL. XVI. S x This 



