FAMILY C0L1MACEA. 123 



Stomodonta edentula, Mermet (1843), Moll. Pyr.-Occid. p. 54. 

 Hab. Northern and Central Em-ope. Siberia. Throughout the British 

 Isles. (Chiefly about the wet roots of grass and under dead leaves.) 



The two remaining species of Vertigo have more whorls in the 

 shell, more narrowly convoluted, and are toothless. V. edentula, 

 the larger, is found in all parts of the British Islands, but it is local 

 and not by any means common. On the Continent it ranges as far 

 north as Lapland and Siberia ; while its southern limit appears to 

 be in Switzerland and Lombardy. 



The animal of V. edentula, according to Moquin-Tandon, is timid 

 and retires within its shell at the slightest touch. It is of the usual 

 slate-grey colour, paler towards the sides, and is quite destitute of 

 any rudimentary trace of lower tentacles. The shell is thin and 

 rather elongately cylindrical, very delicately arcuately striated, with, 

 the simplest possible form of aperture. 



9. Vertigo minuta. Minute Vertigo. 

 Shell ; very minute, oblong cylindrical, rather conspicuously umbi- 



licated, rather solid, fulvous horny, mode- 

 rately glossy, whorls five to five and a half, 



tumidly rounded, constricted at the sutures, 



strongly striated ; aperture rotundately 



ovate, toothless, lip expandedly reflected. 

 Pupa muscorum, Draparnaud (1801), Tabl. Moll. p. 56 



(not Turbo muscorum, Linn.). 

 Pupa minuta, Studer (1820), Kurz. Verz. p. 89. 

 Pupa minutissima, Hartniann (1821), Neue Alp. p. 



220. pi. ii. f. 5. 

 Vertigo cylindrica, Ferussac (1822), Tabl. Sgst. p. 28. 

 Pupa obtusa, Fleming (1828), Brit. Anim. p. 269 (uot of Draparnaud). 

 Alcea cylindrica, Jeffreys (1830), Trans. Linn. Soc. vol. xvi. p. 359. 

 Vertigo muscorum, Michaud (1831), Comp. de I)rap. p. 70. 

 Alcea minutissima, Beck (1837), Ind. Moll. p. 83. 

 Vertigo pupula, Held (1837), Ms, p. 308. 



Vertigo (Istlimia) cylindrica, Gray (1840), Turt.Man. p. 201, pi. xii. f. 140. 

 JSruca muscorum, Swainson (1840), Treat. Malac. p. 334. 

 Stomodonta muscorum, Mermet (1843), Moll. Pyr.-Occid. p. 55. 

 Vertigo minutissima, Graells (1846), Cat. Moll. JEsp. p. 7. 

 Vertigo (IsthmiaJ muscorum, Moquin-Tandon (1855), Hist. Moll. vol. ii. 



p. 399. pi. xxviii. f. 20 to 24. 



