

EXPLANATION OF PLATE LIX. 



VENIELLA TRIGONA (Gabb), P- 537 



i. Lateral view of an internal cast of the left valve. 

 Navesink marl; near Walnford, (.147*). 

 _ 2. Lateral view of an internal cast of the left valve. 

 3. Lateral view of a plaster cast taken from the natural mould 

 of the exterior of the same specimen of which fig. 2 is 

 the internal cast. 



Tin ton Beds; Beers Hill Cut, (129^. 



ETEA CAROLINENSIS Conrad, p. 541 



4-5. External views of a right and a left valve. 



6. Internal view of a right valve, showing the hinge. 



Marshalltown clay-marl; near Swedesboro, (177). 



ETEA TRAPEZOIDEA (Conrad), p. 543 



7. Lateral view of a somewhat distorted internal cast of a right 



valve. 



Mcrchantville clay-marl; Lenola, (J<5j). 



ETEA DELAWARENSIS (Gabb) , p. 546 



8-9. Cardinal and lateral views of a nearly 'perfect internal cast. 

 Manasqnan marl; Pemberton, (101). 



