NORTH -CAROLINA GEOLOGICAL SURVEY. 



223 



Fear River, in Bladen county. As the bones which have 

 been found in these beds indicate the existence at a prior pe 

 riod of two large and formidable saurians, so the teeth con 

 firm this view, and I have placed in this connexion a sculp 

 tured cranial plate, (tig. 40,) which may have belonged to this 

 species. 



Additional discoveries, however, are required before it is 

 possible to determine to which of these plates the teeth re 

 spectively belong. All the bones which are found in the mi- 

 ocene beds, are broken, though they are mixed with perfect 

 delicate shells. This fact proves that the bones were subjec 

 ted to violence before they were imbedded in the miocene, 

 and hence belong, probably, either to the eocene or green sand. 



PMOGONODON NOBILia. LEIDY. (FlgS. 43 & 4-4.*) 



In the collection of Prof. Ernmons there are two, much 

 mutilated teeth of a saurian discovered in a miocene deposit 

 of Cape Fear, North-Carolina. These teeth, which have lost 



their fang and summit, are clou, 

 gated conical, nearly straight or 

 only slightly curved inwardly. 

 Their section is circular with an 

 inner pair of opposed carinae : 

 and their surface is subdivide* ! 

 into numerous narrow planes and 

 provided with a few vertical in. 

 terrupted plicae, which are more 

 numerous internally. The base 

 of the crown is conically hollow : 

 the dentine is concentric; and 

 the enamel is finely wrinkled. 



The specimens measure three-fourths of an inch in diameter 

 at base, and are about one and a half inches long, but when 

 perfect their crown lias been a half inch longer. 



FIGS. 43 & 44, 



* These teeth appear to differ, one has a coarser aspect, and the striar are courser 

 uiul it is more curved, and proportion differs. Description by Prof. Leidy. 



