VERTIGO. 265 



proposed the institution of another genus (Alcea) for the 

 reception of those species which have a dextrorsal spire ; 

 but I now consider this generic addition to be quite 

 useless and untenable. 



7. V. ANGUS'TIOR*, Jeffreys. 



V. angustiar, Jeffr. in Linn. Trans, xvi. p. 361. Pupa Venetzii, 

 F. & H. iv. p. 112, pi. cxxx. f. 9. 



BODY short and stumpy, blackish in front and greyish on 

 the sides and underneath; tubercles indistinct : mantle yellow- 

 ish-grey : tentacles thick, somewhat cylindrical, dusky-grey, 

 considerably diverging from each other ; bulbs scarcely dis- 

 tinct : foot thick and narrow, pale-grey. 



SHELL subfusiform or barrel-shaped, narrower in proportion 

 than V.pusilla, rather solid, but semitransparent, glossy, light 

 horncolour, strongly, obliquely and- rather closely striate in 

 the line of growth : periphery compressed and somewhat an- 

 gular : epidermis thin : whorls 4 J, rather convex, but com- 

 pressed, gradually increasing in size, the penultimate one a 

 trifle broader than the last, which occupies about two-fifths 

 of the shell, the first or upper whorl smooth and shining : 

 spire rather short, abrupt and blunt at the point : suture rather 

 deep : mouth subtriangular, and very narrow in consequence 

 of the great contraction or sinuosity of the outer edge in the 

 middle as well as towards the base ; teeth four or five, viz. 

 two on the pillar (the outer one of which is a little in advance 

 of the other), one on the pillar lip, which is sunk deep within 

 the mouth and resembles a strong curved plate more than a 

 tooth, and one thick and prominent tooth inside the outer lip, 

 with rarely a small tubercle by the side of it : outer lip ex- 

 ceedingly thick and scarcely inflected, strengthened outside 

 and inside by a strong rib, which is situate near the rim and is 

 yellowish- white; the inside rib remarkably thick and increas- 

 ing the contraction of the mouth : inner lip consisting of a 

 slight deposit on the columella : umbilicus very small, narrow 

 and indistinct, being much contracted by a sharp and gibbous 

 keel or crest at the base of the shell. L. 0'06. B. 0'035. 



HABITAT : At the roots of grass in marshy ground, 



* Narrower. 



