EXPLANATION OF PLATE LXVII. 



' -' r ^ 

 CYPRIMERIA EXCAVATA (Morton), p. 602 



1-2. Views of two left valves. 



3. View of the hinge of the right valve. 



4-6. Interior and exterior views of a left valve, and a plaster cast 

 taken from the interior of the same. 



Mar shall town clay-marl; near Swedesboro, (/77). 



CYPRIMERIA CRETACEA Conrad, p. 604 



7-8. The internal cast of a right valve, and a plaster cast taken 

 from the natural mould of the exterior of the same. 

 Woodbury clay; Lorillard, (102). 



1016 



