XXXV 



Plicata,f. 13. 

 Spiralis, 173. 



Interstincta, 173,/ 37. 

 Insculpta, 173. 



examination of the specimens from whence Mr. Hanley's 

 descriptions were taken, have thrown considerable light 

 upon the subject. We have thought it better to erase the 

 descriptions at page 172 and give the following derived 

 from the shells themselves, which not having seen, we had 

 contented ourselves with copying from Fleming. 



O. UNIDENTATA, F. p. 310. not Macg. p. 154. 

 TURBO U. Mont. p. 324. Turt. D. p. 222. Oblong- 

 conical, solid ; whitish, moderately glossy, smooth ; whorls 

 6 or 6, not much raised ; aperture one third of the entire 

 length, not at all effuse at the base ; outer lip ovate, 

 striated internally with fine raised spiral lines ; the tooth- 

 like plate horizontal, placed a little higher up than the 

 middle of the pillar lip ; apex blunt. Length full one 

 quarter of an inch, breadth rather more than half the 

 length. 



O. PLICATA. Fl. p. 310. (uot Macg.) Turbo P. 

 Mont. p. 325? Turt. Die. p. 222. Closely resembling 

 the last, but although much smaller, the whorls are 

 always as numerous, and often more so (7). The shell 

 too is narrower in proportion to its length, and the 

 whorls are flat and polished. 



