178 PNEUMONOBRANCHIATA. 



They sometimes form a thin membranaceous trans- 

 parent epiphragm. Potiez describes a French species, 

 very probably only a variety of S. ollonga, under the 

 name of S. arenaria, which he says buries itself in the 

 sand during the dry weather. 



56. 1. SUCCINEA putris. Common Amber Snail, 

 (t. 4. f. 73.) Shell oblong-oval, smooth, glossy 

 and transparent, reddish amber-colour ; whorls 

 three ; aperture oblong-oval. 

 Turbo tri-anfractus. Da Costa, 92. 

 Succinea amphibia. Drap. Hist. Moll. 58. t, 3. 

 f. 22, 23. ; Lam. H. vi. 135. ; Brard, p. 72. t. 3. 

 f. 1.; Sowerly, Gen. f. 3.; Turt. Man. ed. 1. p. 91. 

 Succinea Mulleri. " Leach, Mollusc, p. 78." 



putris. Flem. ; Jeffreys, Linn. Trans, xvi. 



325. 505. 

 Helix putris. Linn. S. N. 1. 1249.; Mont. p. 376. 



t. 16. f. 14. 

 Helix succinea. Mutter, V. ii. 97. ; Turt. Diet. p. 67. 



limosa. Dillwyn, p. 965. 



Bulimus succineus. Brug. 

 Cochlohydra putris. Fer. 

 Limnea succinea. Flem. 

 Tapada putris. Studer. 



In marshes, on aquatic plants, in most parts of 

 England. 



Animal grey, spotted ; tentacles rugose. 



Shell, when containing the animal, blue-black; 

 about three quarters of an inch long, and half as 

 much broad, of a greenish, amber or orange- 

 yellow colour, very thin and transparent; spire 

 composed of three volutions, the first ex- 



