198 HELlClDiE. 



others, I have now ventured to restore it. The shell is 

 never globose, like that of H. hispida, and it is more 

 glossy ; the umbilicus is considerably more open ; and 

 the hairs are more scattered and easily shed. Besides 

 these differences in the shell, Mr. Smith has pointed out 

 in the ^Zoologist' (1854, p. 4333) that the animal is 

 darker- coloured, and the foot narrower and far less 

 fleshy than in H. hispida, which has a thick yellowish- 

 white foot. From H. rnfescens, with which the present 

 species seems to connect H. hispida, it differs in the 

 shell being much smaller, and in the whorls being more 

 rounded and compact, though equally numerous. All 

 these three species are found together. Sometimes the 

 shell of H. concinna exhibits several formations in suc- 

 cession of the labial rib. 



Beck has referred the H. umbrosa of Partsch to the 

 variety minor of the present species ; but, judging from 

 Rossmassler's figure, the Austrian shell is much more 

 globular. Neither can this be the H. depilata of C. 

 Pfeiffer, which he describes as subglobose and having a 

 narrow umbilicus. He compares it with H. sericea, and 

 not with H. hispida. 



11. H. His'piDA"^, Linne. 



H. hisjndrr, Linn. Syst. Nat. ed. xii. p. 1244 ; F. & H. iv, p. 68, pi. cxviii. 

 f. 1, and (animal) pi. G. G. G-. f. 1. 



Body greyish-brown or slate-colour, mottled with black ; 

 tubercles speckled -udth milk-white : tentacles rather thick, of 

 a somewhat darker colour than the rest of the body : foot 

 rounded in front, marked with fine black specks, gradually 

 narrowing behind to a rather blunt, convex and keeled tail. 



Shell subconic, more convex above than below, rather thin 

 and semitransparent, very little glossy ; colour, markings, and 

 sculpture the same as in H. concinna, but the colour of the 



* Bristly. 



