VERTIGO. 101 
7. V. ANGUSTIOR (narrower) Jeffreys. PI. IV., f. 20. 
Fusiform, but narrower than the last species, glossy, semi-trans- 
parent, horn-colour; closely striate in the line of growth; whor/s 4s, 
the penultimate being the broadest; south sub-triangular and 
narrowed by a strong constriction of the outer margin; ¢eeth 4—5, 
(2 on body, 1 on columella, 1 inside outer lip which is thickened and 
reflected); zméze/écus indistinct. A. 13mm. B. Emm. 
This species is also rare and local, being recorded for 
Derby and Notts. in England, Sutherland in Scotland, 
and for several places in Ireland. 
V.. PUSILLA. | V. ANGUSTIOR. 
Larger, broader in propor- | Smaller, narrower in pro- 
{ 
| 
tion. [> | «portion: 
Last whorl broadest. | Penultimate whorl broadest 
Mouth semi-oval. Mouth triangular. 
Outer lip very slightly con- | Outer lip very deeply con- 
tracted. tracted. 
Teeth six to seven. Teeth four to five. 
C. DEXTRAL, without teeth. 
Sub-genus.—SPHERADIUM Agassiz. 
8. V. EDENTULA (doothless) Draparnaud. PI. IV., f. 21. 
Cylindrical, thin, glossy, horn-colour; slightly striated in the 
line of growth; whorls 54—64; spire abrupt; mouth nearly circular; 
Zip thin; umbilicus narrow. A. 24mm. B. 14mm. 
