EXPLANATION OF PLATE 26 



Fig. la. Spisula falcata (Gould), x 1. Recent. 



Fig. 16. Spisula falcata (Gould), x 1. Recent. 



Fig. lc. Spisula falcata (Gould). < 1. Recent. 



Fig. 2a. Spisula selbyensis, n. sp. x 2. Miocene. 

 Right hinge. 



Fig. 26. Spisula selbyensis, n. sp. x 1. Miocene. 



Fig. 3. Spisula selbyensis, n. sp. x 2. Miocene. 



Fig. 4. Spisula ashburnerii (Gabb). x3 (?). Cretaceous. 

 Hinge of right valve. (After Gabb). 



Fig. 5. Spisula ashburnerii (Gabb). x3 (?). Cretaceous. 

 Hinge of left valve. (After Gabb). 



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