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- 

 lirm 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 rniocene, 

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



PLIOGONODON NOBILI3. LEIDY. (FigS. 43 & 44.*) 



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

 mutilated teeth of a saurian discovered in a miocene deposit 

 of Gape 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 carinne ; 

 and their surface is subdivided 

 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 has been a half inch longer. 



FIGS. 43 & 44, 



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

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



