EXPLAKATIOK OF PLATE XXXVIII. 



Nautilus Dbkayi Morton (p. 243). 



Figs. 1. View of the aperture side of the cast figured by Dr. Morton (see PI. xxxvil, Piga. 2 and 3). 



2. View of a small imperfect cast, showing the siphon and the convexity of the septa. Near 



Marlboro, New Jersey. 



3,4. Two views of a small specimen from the Middle Marls at J. S. Cook's pits, near Tinton, 



New Jersey. This differs slightly in shape and in the distance between the septa and 



may possibly prove a distinct species. 



Nautilus Bkyani Gabb (p. 244). 



5,6. Lateral view and view of the inside of Mr. Gabb's type, showing the narrow form and 

 flattened sides. From the yellow sands of the Middle Marls at Vinoentown, New Jer- 

 sey. 



374 



