72 COLIMACEA. 



more depressed, and with a more ample umbilicus, than the 

 ordinary form. 



22. Helix concinna, pi. VII, f. 32, 33. 



Helix concinna, Jeffreys, Linn. Tr., XIII, p. 337 ; Alder, 

 Mag. Zool. and Bot., II, p. 107; Thompson, Ann. and Mag. 

 Nat. Hist., VI, p. 27 ; Forbes, Mai. Mon., p. 8 ; Brown, Illust. 

 Conch., p. 48, pi. 18, f. 45, 46; Helix depilata, Alder, Mag. 

 Zool. and Bot., II, p. 107 ; Helix circinnata, Ferussac, Prod,, 

 No. 268. 



Shell subdepressed, reddish-brown; body volution large, with 

 a shght carina round its centre ; spire small, abruptly tapering, 

 consisting of four well defined, but depressed volutions, ter- 

 minating in a subacute apex ; aperture sublunate and roundish, 

 its width somewhat more than its length ; outer lip thin, even, 

 with an internal rib ; pillar lip with a slight reflection over the 

 umbihcus, which is broad; exterior covered with rather remote, 

 scattered, irregular, decidous, whitish hairs, which are more 

 plentiful near the suture of the spire, and around the umbilicus, 

 beneath which it is concentrically grooved. Diameter upwards 

 of three-eighths of an inch ; length not quite so much. 



This species is nearly allied to H. hispida, but somewhat 

 larger, with a wider umbilicus, the hairs considerably more dis- 

 tant, and is generally more convex. 



The H. concinna is widely spread all over England and 

 Ireland. Its habitat is in dry situations, under stones and 

 among nettles. 



23. Helix depilata, pi. VII, f. 34, 35. 



Helix depilata, Pfeiffer, I, p. 35, pi. 2, f. 18; Alder, Mag. 

 Zool. and Bot., II, p. 107; Brown, Illust. Conch., p. 49, pi. 18, 

 f. 47, 48. 



Shell subglobose, depressed, concentrically grooved, and of a 

 pale yellowish-brown ; body very large ; spire small, consisting 

 of four volutions, terminating in a sharp point; base rather flat, 

 provided with a pretty large umbilicus ; aperture lunate ; outer 

 lip white, and thickened. Diameter not three-eighths of an 

 inch ; length a quarter of an inch. 



This species is bald in all its stages from the young to the 

 adult condition. It is somewhat like H. concinna, but is con- 

 siderably smaller. 



Inhabits moist situations, under hedges, &c. 



