74 The Shell-Collector’s Handbook. 
varying in colour from pale yellowish-grey to dark red- 
dish-brown, whorls five, convex, the body whorl very 
large; mouth large, oval, and more than half the length of 
the shell; outer lip expanded; inner lip folded on 
columella, forming behind it a concealed narrow groove. 
Length of shell $ to 1 inch; breadth 3rds of the length. 
Animal olive mottled with black and spotted with milk- 
white, black, and yellow. 
Hathitat.—Stagnant waters, and slow running streams. 
v. Burnetti (Alder): Body alittle broader than that of 
the typical form, dark olive, spotted with opaque yellow ; 
mantle nearly black, with a few paler spots. Shell rather 
globular and solid, of a dull aspect, yellowish-brown, 
closely and strongly striate in line of growth; epidermis 
rather thick: the last whorl nearly covering all the others ; 
exceedingly short, nearly truncate, and almost intorted. 
B. C., vol.i., p.105 (= Limnza Burnetti, Alder. Ann. Mag. 
Nat. Hist. N.S. ii., p. 396.) 
_ v. solemia (Zgl.): Shell ventricose, whorls rounded, 
spire short, fauve-coloured, sub-transparent. 
v. ovaliformis (7. D. A. Cockerell): Shell oval, glossy, 
semi-transparent, with close and well-marked striz, the last 
whorl being very convex; spire a little less than half the 
length of the last whorl, moderately long and pointed; 
suture rather shallow; aperture oval, with a diameter 
rather more than half its length. 
v. candida (Porro): Shell white. 
v. stagnaliformis (Taylor): Shell somewhat fusiform 
in shape, the last whorl large, making about iths of the 
total length. Length 35 mill.; breadth 18 mill. Length 
of aperture 25 mill.; width 15 mill. 
v.nitida'( Zeg/.): Shelllarger, slightly transparent, fauve. 
v. ovata (Drap.): Shell ampullaceous, glossy, rather 
thinner; whorls very convex, the body whorl being very 
large; spire acute, very short; suture deep; aperture 
obliquely produced, ¢ths the whole length of the shell. 
