NORTH-CAROLINA GEOLOGICAL SURVEY. 



210 



ing much more compressed. The teeth of the Polyptichodon 

 are circular, and the teeth also of the Pliogonodon, which I 

 found upon the Cape Fear, are also quite circular and conical. 

 It is possible it may be a palatine tooth of the M. Maximiliaui. 

 It differs, however, in form from those teeth. It appears to 

 have had that kind of attachment to the jaw, which has been 

 called acrodont. Length, one and three-quarter inches : 

 width, at base, seven-sixteenths. 



FIG. 



POLYPTYCHODON OWEN. POLYPTOCHODON RUGOSU8. E. 



The teeth (Figs. 38 and 39) which are represented in the 

 margin were discovered in a bed of miocene marl at Elizabeth- 

 town, Bladen county, in 1852- 3. They were regarded at 

 the time as having belonged to an extinct undescribed species. 

 I have had hopes that other parts of this saurian would be 

 discovered which would throw some 

 light upon its organization and form, 

 but as yet no bones which can be re 

 ferred to the genus, or species to which 

 the teeth belonged, have come to 

 light. Saurian bones of a large size 

 are not wanting which may have be 

 longed to the teeth under considera 

 tion, but more than one species have- 

 been discovered. In one instance the 

 middle of a large femur; in others 

 cranial plates, the sculpturing of which 

 are quite different, are among the 

 bones which have been discovered. 

 These, however, are disconnected frag 

 ments, and hence are insufficient to 

 settle the question of ownership. The 

 epoch to which the bones referred to 

 belong is not at all established. Large 

 saurian vertebra have been found in 

 the green sand, and teeth resembling 

 those found at Elizabethtown in the 

 eocene marl upon the Neuse. Hence it is probable that the 



