EXPLANATION OF PLATE XLIV. 



OSTREA BRYANA Gabb, .............................................. p. 44 



1-2. Views of two lower valves. 



3. View of the upper side of a complete individual. 



4. View of the interior of an upper valve. 



Manasguan marl; near Vincentown, (/5p). 



5. An internal cast. 



Manasquan marl; Farmingdale, (/J#). 



GRYPHAEOSTREA VOMER (Morton), ................................... p. 455 



6-9. Views of three lower valves of different forms, and one upper 

 valve. 



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

 lo-ir. Views of a lower and an upper valve. 



Hornerstown marl; near Woodstown, (181). 



970 



