220 
CARD IT A ? lirata. 
TAB CXCVIL— Fig. 3 . 
Spec. Char. Transversely oblong gibbose, with 
9 or 10 longitudinal tuberculated ridges ; the 
ridge separating the posterior side is much the 
highest. 
■T he posterior side is well defined by a large ridge ; it is 
convex, and has two or three tuberculated ridges pass- 
ing over it ; the anterior side is not so plain as in either 
of the other species upon this plate ; the length is twice 
the width. 
Occurs in the Lyas near Bath, from whence it was 
sent me by the Rev. H. Steinhauer, and also in the Corn- 
brash, as I learn from a mutilated specimen. On the 
Lyas specimen, part of the surface, formerly occupied by 
the shelf, is now covered with a coat of calcarious spar, 
which shews that the shell was very thin. 
CARDITA? deltoidea. 
TAB. CXCVIL— Fig. 4 . 
Spec. Char. Very gibbose, obtusely triangular, 
with 8 or 9 longitudinal rugged ridges ; ante- 
rior side pointed. 
The ridges are largest near the posterior part ; they 
are very irregularly tuberculated: the beaks being promi- 
nent, and the anterior side pointed, give the triangular 
contour. 
