KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 50. N;0 5. 11 



fine elevated lines; columella dilated, concave; colour of the shell grayish red to 

 yellowish. Penis tapering, strongly kneed with its stiff end-portion reflected on the 

 under-side of the middle part and terminating with a knob-Hke expansion; osphra- 

 dium lengthened or A\ddened; colour of the mantle grayish L. 10 — 23 mm 



V. undata Brown 1838. 

 Pl. 2, Figs. 1 — 10; 15; Pl. 5, Figs. 27, 28. 



A, Outer lip expanded above and rising beyond the spire, columella broadly 

 concave forma typica (= var. expansa G. O. Särs 1878). 



B. Outer lip not expanded and rising lower than the apex; columella narrowly 

 canaliculated or flattened (habitus of animal unknown) 



var. zonata Gould 1841 (= forma typica G. O. Särs 1878). 

 II. Shell entirely calcareous with a feeble smooth membraneous cuticula and sculp- 

 tured with more distant impressed lines; columella narrow, flattened or rounded 

 with or without a narrow conca\'ity or fmTow, outer lip not expanded above and 

 not attaining the level of the apex; whorls more convex than in the preceding 

 species; colour light reddish (forma typica) or gra;^'ish. Penis cylindrical, regularly 

 curved, abruptly truncated Avith the end of vas deferens minutely projecting; 

 osphradium lengthened; mantle dark purplish. L. about 13 mm 



V. insculpta n. sp. 



A. Aperture moderate, oval forma typica. 



Pl. 2, Figs. 11, 13, U, IG; Pl. 5, Fig. 29. 



B. Aperture subcircular (habitus of animal unknown) var. ampla. 



Pl. 2, Fig. 12. 



III. Shell with a distinct calcareous layer and a distinct brownish cuticula, forming 

 longitudinal lines of growth and distant tufty spiral ridges. Penis a broad project- 

 ing disc with the minute end of vas deferens projecting in its lower outer margin; 

 mantle grayish. Inner whorls gradually narrowing towards the centre of the apex. 

 L. 15—26 mm V. velutina (Muller 1776) 



(= V. Isevigata (Pennant) 1777 = V. haliotoidea Fabricius 1780). 



A. Longitudinal cuticular ridges distinct forma typica. 



Pl. 1, Figs. 17—23; 2(); Pl. 5, Figs. 22, 24. 



B. Longitudical cuticular ridges indistinct or absent; calcareous layer thin 



var. Schneideri Friele 1886 (= V. derugata Becker 1886). 



Pl. 1, Figs. 24—26; Pl. 5, Fig. 23. 



IV. Shell with a more or less distinct inner calcareous and an outer brownish corneous 

 or coriaceous layer, cuticula beset with dense short hairs arranged in spiral lines. 

 Inner whorls bluntly terminating in the centre of the apex. Penis kneed, gradually 

 tapering, its basal part horizontally, its apical part vertically flattened, the last 

 projecting backwards, colour of the mantle grayish. L. 10 — 18 mm 



V. lanigera Möller 1842. 



Pl. 1, Figs. 27—29. 



V. Shell consisting chiefly of a corneous or coriaceous flexible layer of a brownish or 



fulvous colour, but always with a calcareous incrustation in the innermost whorl 



