370 



all of the fame flender diapc; and in the younger fnells, 

 there Avere, in all we examined, a few opaque white lines, 

 crolTmg the fmaller volutions. The largeft meafured an 

 inch and a half in length, and not quite three-quarters 

 of an inch wide, in the largeft part. 



There does not appear to be any material difference 

 between the animals of thefe two fliells ; both are of a 

 yellowifh colour, with two fiiort, flat, conic tentacula, 

 at the bafe of which the eyes are fituated : the fexes too 

 are diflinct, as is ufual in aquatic liviaccs. 



Having faid thus much, we mufl; leave to future ob- 

 fervations the aftual determination, whether it is really 

 diftinft or not: in giving it a feparate place, we have 

 only followed the example of abler naturalills, but we 

 muft confefs it admits of fome doubt. 



The -figure given by Schroeter for the Linnceav. 

 Jragilis, we have quoted, but not without a note of in- 

 terrogation, as it is not fufficiently taper, or flender in 

 the fmaller volutions. 



3. 

 Palu=::tris. Helix paluftrls. Gmel. SyJI. p.365S. — Turt. Lin. iv. p.537. 



Tab. 16. f. 10. Lifier Conch, t. 124. f. 24. 



Id Aji^l t. 2. f. 22. 

 MuUer Verm. ii. p. 131. No. 326. 

 Schroeter FliiJTconch. p. 308. t. 7. f, 7. 9. 10. 

 & 1 1 ^—Hill Sivammerd. p. 73. t. 9. f. 4. 



Heliv 



