PLATE XXXVIII. 
PECTEN (continued). 
P. (Aiquipecten) Beaveri, Sow. (P. 188.) 
Fias. 
1. Chalk Marl, Dover. York Museum. a, left valve; , posterior portion x 3. 
2. H. subglobosus zone, Shelford Lime-kiln, Gog-ma-gog Hill. Woodwardian 
Museum. a, right valve (the ears are drawn from another specimen) ; 
6, antero-ventral portion of left valve of the same specimen. 
3. HH. subglobosus zone, Cherry Hinton. Woodwardian Museum. Interior of part 
of right valve, showing byssal sinus. 
