87 
MODIOLA cuneata. 
TAB. CCXLVIII. — Fig. 2. 
Spec. Char. Transversely elongated, slightly 
compressed, nearly smooth ; posterior side 
small; undefined ; anterior side slightly curved 
and produced. 
An intermediate shell, between Modiola and Mytillus, 
but decidedly a Modiola, although the posterior side 
does not form a distinct lobe ; it is four times as long as 
wide ; the surface is irregularly striated by lines of 
growth ; but otherwise smooth ; the shell is moderately 
thick. 
This was sent me as found in the upper beds of the 
Lyas Clay at Bourton, near Cropredy and Banbury, in 
Oxfordshire, by the Rev. W. D. Conybeare : it is also 
found near Bath. 
MODIOLA plicata. 
TAB. CGXLYIIL —Fig. i. 
Spec. Char. Transversely elongated, slightly 
curved ; back nearly straight, plaited obliquely. 
The anterior side is separated by a ridge, above which it 
is striated, and towards the back the stride disappear gra- 
dually, and strong undulations commence, which, along 
the back, become sharpish plaits that diverge from the 
beaks ; the rest of the shell is smooth, excepting that it 
is marked by blunt irregular lines of growth. The ante- 
