172 
HELICID^. 
under stones; Suffolk^ north of England^ Preston, 
Newcastle. 
Animal blackish grey. 
Shell somewhat smaller than V. pygmcea^ and of a 
more conical shape, with the volutions (four or five) 
more rounded and better defined ; and may be readily 
known by the two distinct teeth on the surface be- 
tween the two lips on the upper part of the aperture, 
the right tooth much the larger. The tip is mostly 
shining ; mouth slightly margined externally ; peri- 
stome thin, reflexed ; perforation small. 
The figure (84.) of the first edition, did not well 
represent this species, which is the smallest of the 
tribe ; it has neither the striae nor the more rounded 
whorls which distinguish it. 
Dr. Turton refers Montagu’s T. ^•dentatus to this 
species ; Mr. J effreys refers it to F. palustris. 
79. 6. Vertigo antivertigo. Marsh Whorl Shell. 
— Shell oval, ventricose, shining, brown ; whorls 
five ; aperture orbicular lunate ; margins ex- 
ternally sinuated, with eight unequal teeth, 
three of which are superior and between the 
lips of the peristome, (t. 7. f. 85.) 
Pupa antivertigo. Drap, Tahl. Moll, 57 , ; Hist, p. 60. t. 3. 
f. 32, 33. ; Forbes and Haydey, B, M. iv. 109. t. 130. f. 7. — 
Vertigo palustris. Turton,^ Man, 104.; Leach^ Moll. Syn. 
93. t. 8. f. 10. — Alsea palustris. Jeffreys^ Linn. Trans, xvi. 
360. — Vertigo Montagua. Leach., MSS, — Helix septem- 
dentata. Ferns, Prod. 64. ; Ilossm. Icon. x. f. 647. — Pupa 
vertigo, var. a and y, Hartm. N. Alp. i. 219.- — Pupa octo- 
dentata. Hartnfi. N. Alp, i. 219. — Vertigo sexdentata. C. 
Pfeiff. D. Moll. i. 71. t. 3. f. 43, 44. — Vertigo antivertigo. 
Michaud., M. F. 72. — Alaea antivertigo. Beck., Ind, 85. 
■ — Stomodonta antivertigo. Mermett^ Moll. Pyr, 54. 
