I^LA.TE 4:. 



PaM. 



FiGL I. Baculites occiDEXTALis; reduced to less than two-thirds the natural 



diameter 366 



1 «. Section of same. 



1 &. A septum of same, enlarged to about 2 diameters. 



Fra. 2. Baculites cniccoEXSis ; reduced as above 364 



2 a. Section of same. 



2 &. A septum of same, enlarged to about 21- diameters. 



2 c First lateral lobe of same, on the opposite side (enlarged in same way), 



showing the differences in the details of this lobe on the two sides 

 of the shell. 

 FtCE. 3L AafXfOXiTES ne-^ybeuryaxus ; side view reduced to about two- thirds the 



aatural diameter 367 



3 a. Peripheral view of same. 



3 &. A septum of same, enlarged to about 3 diameters. 



