142 



B. OBTUSA. Mont. p. 223. t. l.f. 3. F. p. 293. 

 (Walk.t. 3. /. 62.) Lin. T. S.p. 128. Dor\Cat. 

 p. 44. t. 18. / 14. D. p. 497. (Adams, t. 14. /. 

 28.^ Moderately strong, subcylindrical, opaque, white, 

 longitudinally wrinkled ; apex convoluted, obtuse, whorls 

 four or five, very little produced ; aperture nearly the 

 length of the shell, narrow and rather more compressed 

 in the middle, dilated at the base ; iuner lip thickened, 

 smooth, white. 0,20. ..0.10. Kent and Devon. 



B. CYLINDRACEA. Pen. 4. p. 117. t. 59. /. 85. 

 Don. t. 120. Mont. p. 21. t. 7. f. 2. List. t. 714. 

 / 70. F. p. 293. D. p. 496 Dor. Cat. p. 43. t. 

 18 .y.22. Cylindrical, narrow, involuted, white, semi- 

 transparent; smooth, umbilicated at the apex, aperture 

 narrow, linear, slightly dilated at the base ; outer lip 

 straight; pillar lip with an indistint fold. i...0,20. 

 S. Coasts. 



B. ALBA. Turton Z. J. 2. p. 364. t. 13. /. 6. F. 

 p. 294. Ovate-oblong, slightly striated longitudinally, 

 white, unspotted, the vertex umbilicated, three transverse 

 punctured striae at each extremity. |- British Channel. 



TRIBE. LAPLYSIAN^E. 



