LIMNA. 133 
5. L. PALUSTRIS (zzhabiting marshes) Miller. Pl. VII, f. 6. 
Tapering, rather solid, dull brown; whorls 6—7, tumid. A. 25 mm. 
B. 10 mm. | 
This shell is common and abundant on weed in ponds, 
ditches and slow rivers in all parts of the British Isles as 
far north as Aberdeen. Its varieties are numerous and 
often striking. It is amphibious but not to the same 
extent as the next species. 
I once came across a pond in Essex full of nothing but 
the variety corva, some of which measured an inch anda 
half in altitude. 
Var. I. cérva (Gmel.). Larger, more tumid, dark purple. 
Var. II. obésa (Taylor). Very tumid; A. 234 mm. 
B. 144 mm. 
Var. III. édongdta (Mog.). Spire more produced. 
Var. IV. conica (Jeff.). Conical, whitish, suture deep, 
having an umbilical cleft. 
Var. V. minor (Taylor). Smaller; A. 8 mm. B. 45 mm. 
Var. VI. déncta (/Jeff.). Shorter and broader, mouth 
purplish. 
Var. VII. Zacundsa (Ze¢l.). With flattenings, depressions 
and protruberances. 
Var. VIII. fascidéta (Nelson). With 3 spiral dark bands 
on body whorl. 
Var. IX. réseolabidta (Jeff). With rose coloured rib. 
Var. X. élbida (Nelson). White. 
Monst. decollétum (Jeff.). Spire truncated. 
