PLATE XVI. 



Astaete (continued). 



FIrtS. 



1-3. A. (Eriphyla) obovata, Sow. (P. 113.) 



1. Perna-hed, Athcrfield. Left valve. Sedgwick Museum. 



2. Perna-bedi, Sandown. Left valve. Sedgwick Museum. 



3. Upper Gheensand, Blackdown. Hinge of left valve. Museum of Practical 



Geology, No. 13184. 



4. ? Variety of A. (Eriphyla) obovata, Sow. Perna-hed, Sandown. York 

 Museum. Left valve. 



5-7. A. (Eriphyla) laevis (Phill.). Claxby Ironstone, Benniworth Haven. 

 Sedgwick Museum. (P. 115.) 



5 a, left valve ; b, interior ; c, dorsal view- 



6 a, left valve ; b, anterior view. 



7 a, right valve ; b, part of inner margin 



