120 



PLEUROTOMA brevirostrum. 



TAB. CCCLXXXVIL— Ko^. 2. 



Spec. Char. Turreted, acute, costated, trans- 

 versely striated ; aperture obovate, with a 

 defined beak of equal length ; whorls ven- 

 tricose. 



A sharp elegant shell, well distinguished by the short- 

 ness of the aperture and beak together compared with 

 the length of the spire ; the strias are strongest upon the 

 middle of each whorl ; the beak is slightly curved. 



Picked up at Muddiford by Lady Burgoine, to whose 

 kindness I am indebted for the specimen figured. 



PLEUROTOMA laevigata. 



TAB. CCChXXXYU.~~Fig. 3. 



SPEC. Char. Turreted, nearly smooth; spire 

 subcostated ; whorls ventricose, concave 

 above ; aperture elongated ; beak produced. 



Excepting a few obscure transverse striae and the lines 

 of growth, this shell is smooth, the last whorl has no 

 costae ; the length of the aperture and beak nearly equals 

 that of the spire. 



Highgate Hill has produced this species, but the in- 

 dividuals figured, were found along with the last at 

 Muddiford, by Lady Burgoine. 



