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, (159). 



5. An internal cast. 



Manasquan marl; Farmingdale, (138).. 



GRYPHAEOSTREA VOMER (Morton), p. 455 



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

 valve. 



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

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



Hornerstown marl; near Woodstown, (181). 



970 



