MA1ACO2OA. GASTEROPODA. PULMOBRANCHIATA. 85 



afterwards gathered there by me in great abundance, along 

 with Zonites alliarius, Pupa umbilicata, and Bulimus lubricus. 

 This is the only spot in the district in which it has been met 

 with. 



Helix caperata. Mont. Test. Brit. 433. PL 11. f. 11. 

 Helix striata. Drap. 106. PL 6. f. 18-21. Helix caperata. Gray's 

 Turton, 162. Helix caperata. Flem. Brit. Anim. 262. 



5. Helix hispida. Bristly Snail. 



Shell moderately depressed, somewhat hemispherical, very 

 thin, horny, semitransparent, glossy, covered with numerous 

 short, spreading, straight, tapering, glistening, yellowish- white 

 hairs, each arising in a scrobiculus ; the whorls six, convex, 

 distinctly separated by the suture, transversely striate, the last 

 whorl subcarinate ; the base convex, with a rather narrow, 

 deep umbilicus ; aperture semilunar, oblique, with the margin 

 thin and direct ; the colour pale yellowish-brown, with a lighter 

 band along the blunt keel or angle. Diameter four-twelfths, 

 height three-twelfths. 



The animal has the foot pale-grey, the tentacula granulated 

 and dusky; the neck light-grey, granulated with brown, the 

 collar white on the margin, with a transverse dusky band. 



Several species are very nearly allied to this. Helix granu- 

 lata, which is also hispid, is much more convex above. Helix 

 sericea is also more globular. Helix concinna differs little un- 

 less in being somewhat larger and less hairy. All the individuals 

 of the present shell which I have gathered are downy, with 

 rather closely-set, shortish, spreading, straight hairs, which 

 do not appear to be deciduous, and in fact cannot be rubbed off 

 without some difficulty. The greatest size is four-twelfths in 

 diameter, three-twelfths and a-fourth, or three-twelfths in 

 height ; the colour varying from pale yellowish-brown, to a 

 deeper brown on the one hand, and yellowish-grey on the other. 



First found by me, while with my class, under stones among 

 the ruins of Dunottar Castle, where it is abundant, along with 

 Zonites cellarius, Zonites rotundatus, Pupa umbilicata, Vitrina 

 pellucida, snd Balea perversa. 



Helix hispida. Muller, Verm. Terrestr. et Aquat. ii. 73. 

 Helix hispida. Drap. 103. PL 7. f. 20, 21, 22. Helix hispida. 

 Lamk. Syst. Ed. n. viii. 73. Helix hispida. Gray's Turton, 



6. Helix Trochulus. Pyramidal Snail. 

 Shell conico-convex, with six whorls, which are well rounded, 

 thin, transparent, glossy, faintly striate transversely, and very 

 H 



