EXPLANATION OP PLATE XLYL 



Baculites C0MPRK8SUS (Say) Morton (p. 277). 



f'lGS. 1. Lateral view of the specimen used and ligured by Dr. Morton in Iiis synopsis. The dia- 

 gram below shows the form of the section. Acad. Nat. Soi., Phila. 

 2. Diagram of a septum of the above specimen (2 x). 



Bacdiites ovatus 5>ay (p. 275) 



3,4. Lateral view of the MuUica Hill specimen in the collection of the Am. Mus. Nat. History, 

 New York, and diagram of the section showing an oval outline. 



5,6. Lateral view of a specimen showing an ovate section and diagram of the section. 

 7. Diagram (2 x) of a septum of the specimen Fig. G, for comparison with Fig. 2. 



8,9. View of a small specimen from the Middle Marls, near Tintou Falls, New Jersey, and a 

 diagram of its section. 



Baculites asper Morton (p. 278). 



10. Lateral view of a fragment supposed to belong to this cpecies. 



11. View of the upper end of the fragment showing the septum in part. 

 390 



