A 



34 



of Kent, it has been confidercd a rare fpecies, and the 

 P. lacdjiris altogether as plentiful ; a fliell we believe 

 not known fo far weft as the former county. Such is 

 the locality of nature's ftores. 



6. 

 Lacustris. Patelb lacuftris. Lht. Syft. ■p. 1260} 



Gmel Syfi. p. STlO. 97. 

 Fdvan. t. 61. A. 1 '>—Turt. Lin. p.577, 

 Schroder Fluffconch. t, 5. f. 4. a. b. 

 Patella oblonga. TulL Cut. Dorfet. p. 51. 



Phil. Tram. LXXVI. p. 16S. t, 3. f. 1. 

 2. 3, 5. (Lightfoot.) 

 Ancyks lacuftris. Mulkr Verm. ii. p. 199. No. 3S5. 



P. with a thin, pellucid, compreffed, and almoft mem- 

 branaceous fliell, of a pale horn-colour, moft commonly 

 covered with a greenilh epidermis : (hape oblong : ver- 

 tex very fmall, pointed, a little reflefted, (landing ra- 

 ther oblique, or turning to one fide ; not quite central, 

 but rather neareft to one end: outfide nearly fmooth, 

 or very faintly wrinkled, but not gloffy : aperture ob- 

 long-oval, nearly equal at each end: margin membra- 

 naceous. Infide fmooth and gloffy. Length a quarter 

 of an inch, or rather more ; breadth one eighth ; height 

 about half its t)readth. 



Do6lor PuLTENEY favs, this fliell is found on plants 

 in the river Stour in DoTfetJhire, and has quoted the 

 P. Jluviatilis of Gmelin and Muller, in which we 



think 



