219 
CARDITA ? producta. 
TAB. CXCVIL— Fig. i. 
Spec. Char. Transversely oblong, gibbose, with 
six or seven angular longitudinal ridges ; an- 
terior side produced, plain. 
T he length is about two-thirds the width : the ridges 
are highest towards the posterior half, and I suspect in 
the young shells they are tuberculated. The beaks are 
rather prominent. A cast from the inferior Oolite, near 
Bath, the Rev. H. Steinhauer. I have it young in Piso- 
lite, from Chapel House, near Chipping Norton, given 
me by Mr. B. Clark ; and also from Peterborough, in 
compact limestone, by favour of Mr. H. Jenkins, 
CARDITA? obtusa. 
TAB. CXCVII.— Fig. 2. 
Spec. Char. Transversely obovate, recurved, gib- 
bose, with from 7 to 10 longitudinal, nearly 
equal, tuberculated ridges. 
The anterior side is largest, obtuse, and plain; the 
slope above it is concave ; the length is but little less than 
the width. 
From the inferior Oolite, near Bath, and at Dundry, 
both casts : it was brought me from the latter place by 
Lady Wilson, whose zeal for collecting has seldom been 
equalled. 
