320 HELIX. SNAIL. Class VI. 



3. planor- Lin. Syst. 1242. No. 662. Faun. Suec. No. 2l?6. 



bis. Gm. Lin. 3617. Lin. Tr. viii. 188. f.5.f. 13. 



List. Angl. tab. ii. Jig 27. H. complanata. Mont. Test. 

 Gualtieri, tab. iv. Jig. E. E. Br. 450. 



He. with a very flat brown shell, slightly cari- 

 nated on the outside ; aperture oblique. 

 Inhabits ponds. Tab. lxxxvi. Jig. Q. 



4. planata. Lin. Tr. viii. I89. 



# He. with acarinated, umbilicated plane shell, 

 the carina or ridge on the middle of the volu- 

 tion ; aperture nearly oval ; diameter half an 

 inch. 



5. vortex. Lin. Syst. 1243. No. 667. Faun. Suec. No. 2178. 

 whirl. Gm ^ Lin 3 g 20> i in 7v. v iij. 18 p. 



List. Angl. tab. ii. Jig. 28. Mont. Test. Br. 454. id. Sup. 



Gualtieri, tab. iv. Jig. G. G. t. 25. J. 3. 



List. Conch, tab. 138. Jig. 43. 



He. with a very flat thin shell, and six small 

 spires. The outmost carinated. 



Found with the H. 'planorbis. Tab. lxxxvi. 



