120 
PLEUROTOMA brevirostrum. 
TAB. CCCLXXXVII. — Fig. 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 striae are strongest upon the 
middle of each whorl ; the beak is slightly curved. 
Picked up at Muddiford by Lady Burgoine, to whose 
kindness [ am indebted for the specimen figured. 
PLEUROTOMA laevigata. 
TAB. CCCLXXXVII.— 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. 
