CERITHIUM. 157 
77. CERITHIUM LECKHAMPTONENSE, sp. nov. Plate IX, fig. 2. 
Description : 
Length (about) : : : . 27 mm. 
Width == J mm! 
Length of body- wlio to see shell ‘boat = sor 00: 
Spiral angle : 20°. 
Shell elongate, scarcely turrited ; fimbOe of aborts probably twelve, apical con- 
ditions unknown. Whorls short, slightly convex in the middle stage, but becoming 
flat anteriorly, sutures close. The ornaments consist of about ten spiral lines of 
somewhat unequal strength, which are decussated by numerous thick, though not 
prominent cost«, which are slightly arcuate, and slope considerably from left to 
right. The cost become faint in the penult. 
The body-whorl is about one-third the total length of the shell. Fine spiral 
lines are the only ornaments, the cost having entirely disappeared. Base tolerably 
full and spirally striated. Aperture (?) ovate, with a considerable callus on the 
columella. Other indications wanting. 
Relations and Distribution.— As far as I know, this farm seems to stand pretty 
much by itself. The failure of axial coste on the anterior whorls might suggest 
some degree of relationship to certain varieties of the vetwstwm-group, but otherwise 
there is no resemblance. 
A single specimen from the Inferior Oolite of Leckhampton Hill. 
78. CuritHtum (species or variety). Plate IX, fig. 3. 
Description : 
Length (about) : 5 : . 20 mm. 
Width =. : : . 4mm. 
Spiral angle (about) : 5 alte 
Shell very subulate, turrited ; spiral angle esr regular. Whorls about sixteen, 
short and very flat; suture close. The extreme apical whorls are apparently 
devoid of ornament. The subapicals have three well-cut spirals, which decussate 
with numerous longitudinals of about equal strength, inclining from left to right. 
Four, and ultimately five, spirals are developed in the anterior whorls. A very fine 
mesh results from the decussation of such equal spiral and longitudinal lines, the 
enclosed space being rectangular and spirally elongated; the nodes at the inter- 
sections are very slight. 
