150 HELICID2E. 



a. Shell ovate, whorls gradually enlarging, covered 

 with a brown periostracum ; peristome thickened, 

 reflexed. (Ena Leach.) 



64. 1. BULIMUS montanus. Wiltshire Twist Shell. 

 Shell conic-oblong, reddish brown, obliquely 

 striolate ; the peristome reflected and forming 

 an umbilicus, (t. 6. f. 62.) 



Helix lackamensis. Mont. p. 394. t. 11. f. 3. Helix bucci- 

 nata. V. Alien, E. and F. Conch. 100. t. 12. f. 22. 

 Bulimus Montacuti. Jeffreys, Linn. Trans, xvi. 345. 

 Bulimus obscurus. Hartmann, N. Alpina, i. 222. Bulimus 

 montanus. Drop. Tab. Moll. 65., Moll. p. 74. t. 4. f. 22. ; 

 Turton, Man. ed. 1. 80. f. 62.; Sturm, Fauna, vi. t. 6.; 

 Pfeiffer, 52. t. 2. f. 10. ; Rossm. Icon. i. f. 41. vi. f. 386. 

 Bulimus (Bulimulus) montanus. Charpent. 14. t. 2. f. 2. 

 Helix sylvestris. Studer, in Coxe's Travels. Helix ob- 

 scura. Schrank, Fauna, B. iii. 273. Bulimus lackamensis. 

 Fleming, B.A.265.-, Gray, Man. 181.; Forbes and Han- 

 ley, B. M. iv. 89. t. 128. f. 6. Bulimulus lackamensis. 

 Beck, 2nd. 71. Ena montana. Leach, Moll. Syn. 80.; Hart- 

 mann. 



In moist beech woods, among decayed leaves, and 

 on the bark of trees. Wiltshire, Bristol, southern 

 and western. 



Animal pale ; tentacles club-shaped. (Mont., 

 Sturm.) 



Shell five eighths of an inch long, and a quarter 

 of an inch wide, deep chocolate-brown varying to 

 light grey, conically elongated ; spire consisting of 

 seven slightly raised but well-defined volutions end- 

 ing in a rather acute point, irregularly and obliquely 

 striate longitudinally, and when magnified having 

 the appearance of a shagreen-like roughness ; aper- 

 ture oblong-oval, with the peristome chocolate-brown 



