TAB XV. 



Fig. 

 1 a—f. Cardita senilis, page 165. 



2(2, b. „ corbis, var. nuculina,j». 168. 



c, d. 



3 a. h. 



4. 



5. 



6. 



„ exigua. 

 chamseformis, />. 167. 

 orbicularis,/^. 167. 

 scalaris, jo. 166. 

 analis,j». 168. 



7 a — d. Coralliophaga cyprinoidesjjo. 200. 



6, c. ,, „ var. elongata. 



d. „ „ slightly enlarged view of the hinge. 



8 a — d. Chama gryphoides, jo. 162. 



9 a, h. Isocardia cor, p. 1 93. 



10 a — d. Erycinella ova]is,jo, 171. 



e,f. Enl arged views of the hinge^ showing a central cavity of the 

 ligament. 



The lines indicate the size of the specimens. 



I 



