LIMNEA. 



tainty. It becomes pale horn-colour and white when ex- 

 posed. Diameter to the length as 6 to 13. 



2. h.ovalis; testa ovalis, pellucida, pallid^ cornea : concinn^ transversim 

 striata, anfractibus 5. Spira brevissima, acuta, suturis fere horizoDta- 

 libus. Apertura ovalis, elliptica. Tab. nost. f. 4, 



Ohs, — Diameter to the length as 5 to 9. 



Fig. 1. Limnea stagnalis. 



2. rufescens, Gray Syst, Mollusc, ined. et supra. 



3. fusiformis, Min. Con, 1. 169. f. 2. 3. a fossil species from 



Headen Hill. 



4. ovalis. Gray, «t supra. 



5. glutinosa. 



6. elongata, Drop. 



7. (Physa) castanea. Lam. vi. pt. 2. p. 156. 



8. , fontinalis. 



9i , rivalis — a species which has been admitted into 



the English catalogue, but we only know it to be found in Gua> 

 daloupe. 



10. , turrita, Lam, (Bulla hypnorum, Lin.) 



