221 



t. 6. /. 7. M. VOLUTA. P.p. 335. -Conoid, convo- 

 lute, whitish, polished, strong, smooth ; extreme volu- 

 tions two, very small; aperture linear, both lips 

 denticulated, the inner very faintly, outer lip much 

 thickened and very white; columella subplicated. i. 

 Devon. 



M. CATENATA. VOLUTA C. Mont. p. 236. t. 6. 

 /. 2. and Sup. p. 104. F. p. 332. Lin. T. S.p. 132. 

 D. p. 527. Oblong-oval, strong, subpellucid, po- 

 lished, white with four bands of articulated opaque 

 white oblong and small rufous spots or streaks; upper 

 volution scarcely defined, the apex indented and invo- 

 luted; aperture the whole length of the shell, linear; 

 outer lip thin but not marginated and obsoletely denti- 

 culated; pillar with strong and two faint folds. .... 

 Cornwall and Guernsey: 



GENUS. VOLVARIA. 

 Cylindraceous. convolute, the spire scarcely prominent ; 



aperture narrow, as long as the shell ; one or more 



plaits on the lower part of the pillar. 



V. PALLIDA. P.p. 333. VOLUTA P. Lin. 1189. 

 D. p. 527. List. t. 714. / 70. left hand fig. Mont, 

 p. 232. BULLA CYLINDRACEA. Da Cos. t. 2./. 7. 

 B. PALLIDA. Don. t. 66. Smooth, glossy, white, 



