192 
B. 
alba. 
Dr. Maros's and Mr. Rack ETTS 
Chemn. Conch. 9. t. 127. f. 1126. 
Pulteney in Hutch. Dorset. p. 47. t.20. f. 11. H. um- 
bilicata. 
Donovan Brit. Shells, t. 99. 
Montagu Test. Brit. p. 457. 
Habitat in rivis et fossis. : 
Testa magnitudine seminis brassice, raro major, Anfractibus quatuor 
arctissime sibi invicem obvolutis ; utrinque fere szequalis est testa et 
utrinque concava, Apertura literam C refert, seu lunam in primo 
quadrante ; corpus nigrum, corniculis subulatis, longis, cum in aquis 
versatur, €t e testa prorepit animalculum vivum; videtur testa eminus 
inspecta, quasi deaurata. (Fn. Suec. p. 528. n. 2181.) 
Supplem. t. 25. f. 6. 
First noticed and figured by Petiver. Mr. Donovan, 
at our suggestion, first gave this species as Helix con- 
torta of Linnzeus, with whose minute and exact descrip- 
tion it corresponds in every respect. It may be readily 
distinguished by its appearance of being gilded, when 
occupied by the living animal, and viewed in water. 
-> This is rather a local species. Found in ditches 
near Lackham, Wilts; in the Isle of Purbeck, near 
Wareham, and at Charmouth, Dorset, by Mr. Mon- 
tagu; and plentifully at Spetisbury, Dorset, by the 
Rev. T. Rackett. 
H. testa utrinque umbilicata striata; apertura dilatata. 
- Linn. Gmel. p. 3625. | 
-Petiver Gaz. t. 92. f. 7. 
Muller Verm. 3. p.. 164. n. 350. -> uani 
Walker Test. Min. Rar.f.19. io I< 
Schrót. Flussconch. t. 5. f. 12. — SERE TT 
Montagu Test. Brit. p. 459. Supplem. 4. 25. f. 1. 
Pulteney in Hutch. Dorset. t, 9.f.18... - 
: : Halitat 
