150 HELICID^. 



a. Shell ovate, whorls gradually enlarging, covered 

 with a brown periostracum ; peristome thickened, 

 rejiexed. (Ena Leach.^ 



64. 1. BuLlMUS montanus. Wiltshire Twist Shell. 

 — Shell conic-oblong, reddish brown, obliquely 

 striolate ; the peristome reflected and forming 

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



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

 nata. V. AUen, 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., 3Ioll. 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. Char-pent. 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.2&5.; Gray, Man. 181.; Fo?-bes and Han- 

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

 Beck, Ind. 71. — Ena montana. Leach, Moll. Syn. 80.; Hart- 

 rnann. 



In moist beech woods, among decayed leaves, and 

 on the bark of trees. Wiltshire, Bristol, southern 

 and western. 



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

 Sturrn.) 



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 



