PLATE LI. 



Buccinum subflavum pellucidum, quatuor orbium, ore ampHssImo, 

 mucrone acuto. List. H. Conch, tab. 123. 

 fig' 22. 



Buccinum fluviatile pellucidum, subflavum, quatuor spirarum, mu- 

 crone acuto, testae apertura patentissima. List. 

 Exerc. Anat. 2. p. 54. 



Turbo with four wreaths, a rcmarkabk large mouth, and a short 

 acute apex. Wallis Northuynb. p. 370. 



Helix aurlcularia. Pe7in. Br. Zool. No. 138. tab. S6. Jig. 138. 



Turbo subflavus pellucidus quatuor spirarum ore patulo. Patulus. 

 "Z^a Costa sp. 53. p. 95. tab. 6. fg. 17. 



Found in plenty in rivers, ponds, &c. 



FIG. IL 

 HELIX STAGNALIS, 



L^KE SNuilL, or FRESH WATER TURBO. 

 SPECIFIC CHARACTER 



AND 



SYNONYMS. 



Without umbilicus. Oblong ; spire tapering. Several prominent 

 longitudinal wrinkles which somewhat angulates the shell. Aperture 

 oblong oval. 



