120 LIMNAIDA. 
running in a spiral direction, though sometimes these 
hairs are absent. 
It occurs throughout the British Isles as far north as 
Sutherlandshire. 
Var. I. draparndldi (Shepp.). Carinated, destitute 
of spiral strize. 
Var. Il. suleéta (Taylor). With strong curved ridges 
in line of growth, about 30 on last whor!, the intervening 
spaces being occupied by broad sulci (furrows). 
Monst. scalériforme (L. E. Ad.). Whorls twisted into 
the form of a screw, in great numbers in Scout Dam, 
Penistone, Yorkshire. 
5. 2. PARVUS (small) Say. Pl. VI., f 5- 
[=P. GLABER Jef]. 
Convex above with a depression in the centre, concave beneath ; 
rather thin, glossy, horn-colour, finely striated transversely and still 
more faintly spirally; whorls 5; seture very deep; mouth nearly 
circular ; zzbzlicus large. A. 14mm. B. 35 mm. 
This is a local shell, though it has a range extending 
the entire length of Great Britain, though not into Wales. 
It has been found in Ireland. Though resembling P. 
albus in shape (but smooth and glossy) it is more likely 
to be mistaken for the young of -. umbilicatus, as the 
young of that species is sometimes only very faintly 
keeled. 
Var. compréssa (Lloyd). More concave below than the 
type, whorls rounder, making the shell more compact. 
(Found near Birmingham), 
