EXPLANATION OF PLATE LIX. 



VENIELLA TRIGONA (Gabb), p. 537 



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



. Nave sink 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. 



Tinton Beds; Beers Hill Cut, (/<?9 5 ). 



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. 



Merchantville clay-marl; Lenola, (/6"j). 



ETEA DELAWARENSIS (Gabb) , p. 546 



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

 Manasquan marl; Pemberton, (101). 



1000 



