VERTIGO. 169 



Mr. Jeffreys, in his Supplement, observes, u The 

 Alaa revoluta of his Synopsis is an old bleached spe- 

 cimen, with the aperture placed more extrinsically 

 than usual." (Linn. Trans, xvi. 515.) 



75. 2. VERTIGO muscorum. Cylindrical Whorl 

 Shell. Shell attenuated, pellucid, pale brown, 

 acutely obliquely striated ; whorls five, convex ; 

 mouth ovate, slightly margined externally, 

 toothless; umbilicus narrow, (t 12. f. 140.) 



Pupa obtusa. Flem, Brit. Anim. 269. (not Drap.) Alsea 

 cylindrica. Jeffreys, Linn. Trans, xvi. 359. 515. Vertigo 

 cylindriea. Ferussac, Tab. Moll. 64.; Alder, Mag. Zool. 

 and Bot. ii. 112.; Gray, Man. 200. t. 12. f. 140. Pupa 

 muscorum, var. a. Drop. Tabl.Moll. 56. 1801, Hist. Moll. 

 59. t. 3. f. 36, 37. Pupa minutissima. Hartmann, Neue 

 Alpina, 220. t. 2. f. 5. 1821 ; Pfeiffer, iii. 38. t. 7. f. 12, 13. ; 

 Eossm. Icon. i. t. 2. f. 38. 84. ; Forbes and Hanley, B. M. iv. 

 104. t. 130. f. 2. Pupa minuta. Studer, Cat. 89. 1820. 

 Vertigo muscorum. Mich. Comp. 70. ; Moq. Tand. Moll. 

 Franc, ii. 399. t. 28. f. 20. 24. Pupa (Sphyradium) mus- 

 corum. Charpent. i. 15. Vertigo pupula. Held. Isis, 1837, 

 303. Alaea minutissima. Beck, 2nd. 85. Eruca mus- 

 corum. Swain. Malac. 334. Vertigo minutissima. Graetts, 

 Cat. 7. Stomodonta muscorum. Mermett, Moll. Pyr. 55. 



Inhab. under stones on downs. (Hemerg, 1813.) 

 Animal blackish red, shining ; lateral lobes large, 

 rounded. 



Dr. Fleming, who first described this shell, con- 

 founded it with Pupa obtusa of Drap., but he ob- 

 served that it is not a line in length, while Drapar- 

 naud's shell is about half an inch; this has only 

 five whorls, and his has eight. It was sent to Dr. 

 Fleming by Mr. Chambers, surgeon, Kirkaldy, who 

 found it in the parish of Balmenna, Fifeshire, 



