la. —Cast of right valve of another specimen, natural size. No. 7, White- 

 horse collection. 



76. — Cast of left valve of a large specimen, poorly preserved, probably 

 of this species, natural size. No. 6, Whitehorse collection. 



Capulus sellardsi. Page 170. 



8.— Cast of a large, rather narrow specimen, dorsal view, natural size. 

 No. 4, Whithorse collection. 



8a. —Same view of another individual, broad form, natural size. No. 2, 

 Whitehorse collection. 



86. — Enlargement of surface detail from posterior, right part of 8a. 



8c. —A young specimen of this species, natural size. No. 5, Whitehorse 

 collection. 



8d.— Dorsal view of intermediate form, natural size. No. 3, Whitehorse 

 collection. 



8e.— Dorsal view of the type specimen, a cast, natural size. No. 1, White- 

 horse collection. 



8/.— Lateral view of 8e. 



