Mollusca of Great Britain. 379 
Long. 0.6.—Diam. 0.4. 
Helix detrita. Müll. Verm. 2. p. 101. Pult. Dorset. 
p- 49. 2d edit. p. 56. t. 19. f. 26. Mont. Test. Brit. 
p. 384. t. 11. f. 1. 
—-— substriata. Gmel. —— Nat. 1. p. 3667. Dillz. 
Cat. 2. p. 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 Limneade 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 perje latum, 
anticè integrum. — 
Testa sinistrorsa, oblonga, ampullacea. Aperiare oblongo, ad 
basin effusa: peristomio simplici: columellá revoluta. 
1. FONTINALIS. 
. Animal nigro-griseum. Tentacula albida. Pallium amplum, 
in lacinias divisum. uem 
Testa ovetooblagun. yentripoem fragilis, diaphana, nea; | 
-= Physa fontinalis. Drap.E Hist. dei $ Moll. p.54. t.3. f. 8, 9. ! 
= Bulla fontinalis. Linn. Syst. Nat. 1. p. 1185 ES 
Planorbis Bulla. Müll. Verm. Z. p.167 — — 
T E a. major, 
