THE 1A3T1) ANfc fRESlTtfATEfc JfOLLtfSCJA OF DORSETSHIRE, 115 



18. PYGM^A, Draparnaud, pi. 9. 



Robinson's Purbeck, p. 178. 

 Body dusky-black, or greyish slate-colour, speckled with black. 



Shell depressed above and below, thin, fragile, rather glossy, 

 palish red, or brown, marked longitudinally with extremely fine, 

 irregular striae ; whorls four, convex, increasing gradually ; spire 

 flattish ; suture deep ; umbilicus exposing the exterior of the spire ; 

 mouth oblique, horse-shoe shaped, with no internal rib. L.0.03. 

 B.0.06. 



Hab. Woods and moist places, under stones and among dead 

 leaves in moist places ; often overlooked on account of its 

 minuteness. In a lane near Godlingston (Smith). East Lul worth 

 (Kendall). Under stones, Round Down, Swanage (J.C.M.P.). 

 St o borough. 



19. H. PULCHELLA, M'tiller, pi. 9. 



HELIX PALUDOSA, Pult. cat., Rack, ed., p. 53, pi. 19, fig. 25; 

 Maton and Racket, Trans. Linn., Soc., 

 vol. viii., pi. 193, pi. 5, fig 5. 



Eobinson's Purbeck, p. 177. 



Body exceedingly truncate before, bluntly pointed behind, white, 

 with a yellowish tinge, darker below, slightly shagreened on the 

 back and sides. 



Shell depressed, very flat above, convex below, thin, very solid, 

 semi-transparent, glossy, grey or white with numerous fine 

 longitudinal striae, nofc very distinctly marked ; periphery not 

 keeled, except in the young, and then bluntly so ; whorls three-and- 

 a-half, the last exceeding the rest of the shell in size ; spire very 

 little raised ; suture deep; mouth circular, with a broad expanded 

 and reflexed edge ; umbilicus large, exposing most of the whorls and 

 all the internal spire. L.0.04. B.0.09. 



Var. costaU. Sh^ll much less glossy, and marked transversely 

 with curved membranaceous ridges. 



Hab. Under stones and logs of timber, in moss and among 

 grass. Spettisbury, (T. Rackett) ; among moss, Whatcombe 

 Park : Houghton and Clenston Woods ; under stones in pas- 

 tures, Puncknoll ; Durleston Bay, abundant between Swanage 

 and Dancing Ledge, at the roots of grass (J.C.M.P.) Var- 

 Neighbourhood of Swanage, (Smith) ; Weymouth (Damon). 

 Holme -, Creech Grange. 



