Mollusca of Great Britain. 379 



Long. 0.6. — Diam. 0.4. 



Helix detrita. Miill. Verm. 2. p. 101. Fult. Dorset. 



]). 49. ^d edit. p. 56. 1. 19. f. 26. Mont. Test. Brit. 



p. 384. t. 11. f. 1. 

 substriata. Gmel. Syst. Nat. 1. p.5667. Dillw. 



Cat. 2. /;. 958. 



Given me by Mr. Dillwyn, who thinks he procured 

 them from the neighbourhood of Bantry, Ireland. I place 

 it last, as a doubt may reasonably be entertained of its be- 

 longing to this genus ; or indeed to the Limnaadce at all. 

 Mr. Bryer is said to have found it in several streams in 

 Dorsetshire ; and Dr. Turton says that he has himself seen 

 it alive in Freshwater, Dublin. It is not the Bulimus ra- 

 diatus of Bruguiere and Draparnaud, 



Genus XIV. PHYSA. Drap. 



Animal tentaculis filiformibus. Sustentaculum perbreve, latum, 



antic^ integrum. 

 Testa sinistrorsa, oblonga, ampullacea. Apertura oblonga, ad 



basin eff'usa : peristomio simplici : columelld revolut^. 



1. FONTINALIS. 



Animal nigro-griseum. Tent a cula alhida. Pallium amp\\im, 



in lacinias divisum. 

 Testa ovato-oblonga, ventricosa, fragilis, diaphana, cornea; 



spir4 brevi, obtus^, excentric^. Anfractus 4. Apertura 



ovato-oblonga. 



Long. 0.3. —Diam. 0.2. 



Physa fontinalis. Drap.Hist.desMoU. p.54. t.3.f.8,9. 

 Bulla fontinalis. Lifin. Syst. JSlat. 1. p. 1185. 

 Planorbis Bulla. Mull. Verm. 2. p. 167. 



a. major, 



