On Succinea amphibia. 



477 



Genus Sue cine a, (Drap.) : Amber-shell. 

 Animal. — Tentacula short; the superior swollen, conical. 

 Shell.— Oval or oblong : aperture large, oblique : pillar spiral. Plane 



of the aperture much inclined in front, in relation to the axis of 



the shell : (Drap.). 



1,2, var. /3, major ; 3, 4, var. y, media ; 5, 6, var. 8, minor. 



1. S. amphibia, (Drap.). Common Amber-shell. 

 Animal blackish, thick, very glutinous, spotted, occupying the whole of the 

 shell, having four tentacula, the two superior longer than the inferior, at 

 the extremities of which are situated the eyes, also slightly rugose in the 

 centre. 



Shell varying much in size, being from 4 to 9^ lines in 

 length, and from 3^ to 5 in breadth ; the usual size of full 

 grown specimens is about 8 lines in length and 4^ in breadth; 

 of somewhat an oval figure, pale amber or orange yellow, oc- 

 casionally slightly opaque, glossy, transparent, and striated 

 longitudinally. Spire composed of three oblique swollen vo- 

 lutions, of which the inferior is the larger, the remaining two 

 gradually tapering to an obtuse apex. Aperture covering -J 

 of the shell, oval, lip usually entire, simple, membranous at 

 the margin. 



Succinea amphibia, Drap. Hist, des Moll. p. 58, t. 3,/. 22. 



Beard, p. 72, t. 3,/. 1. 



Sowerby, Genera,/. 3. 



Lamarck, Hist, des Animaux sans Verteb., vi. p . 135. 



Succinea Mulleri, Leach, Mollusca, p. 78. 

 Helix Succinea, Turt Diet. p. 67. 



putris, Mont. p. 376, t. 16,/. 14. 



limosa, Dillwyn, Cat. ii. p. 996. 



Of this species Draparnaud makes three varieties : — 

 Var. 0, major, thicker and flesh coloured ; {Fig. 1 and 2). 

 Vol. II.— No. 21. n. s. y y 



