PLATE XXVIII. 



Pecten [continued). 



P. [Camptonectes) cinctns, Sow. Claxby Ironstone (zone of B. lateralis) 

 of Claxby. Wooclwarclian Museum. (P. 152.) 



Figs. 



1 a. Right valve X ^. lb, portion of tlie same, natural size. 



2 a. Left valve of another specimen X f . 2 h, portion of the same, natural size. 

 3. Portion of left valve with the concentric laminge well preserved X 2. 



(The ears in figs. 1 a, 2 a, have l^een partly completed from other specimens.) 



