428 



MESOZOIC TIME — REPTILIAN AGE. 



fossils of Gwynned, Pa., twenty miles north of Philadelphia, and also among 

 those found at Phoenixville ; and Emmons has figured a portion of the head of 

 a fine species from North Carolina. 



Figs. 639-644. 



Fig. 639, Macropterna divaricans ( X V& ) ; 640, Apatichnus bellus ( X X A ) ; 641, Anomoepus 

 scambus, fore foot ( X%); 641a, hind foot of same; 642, Anisopus Deweyanus, fore foot 

 (Xl4); 642 a, hind foot of same: 643, A. gracilis, fore foot (X%); 643 a, hind foot of 

 same; 644, Otozoum Moodii, fore foot; 644a, hind foot of same (both X A )• 



(b.) Lacertians. — Fig. 647 is a tooth, 

 sylvanicus Lea. It has a sharp denti- 

 culate edge. Occurs in Division 1 in 

 North Carolina, and also near Phoenix- 

 ville, Pa. Centemodon sulcata.? Lea is 

 the name of a related Reptile from Phoe- 

 nixville. Fig. 648 is a striated tooth 

 of Rutiodon Carolinensis Emmons. Fig. 

 646, tooth referred to a Palseosaur, — one 

 of the Thecodont Lacertians, — a short 

 and broad flattened tooth. Fig. 645, 

 Bathygnathus borealis Leidy, from Nova 

 Scotia (reduced one-half). Coprolites 

 are abundant in the shales of Phoenix- 

 ville. Fig. 641, a, Anomoepus scambus 

 Hk., is probably the track of a Lacer- 

 tian, but its relations are very doubtful. 



A general review of the Pennsyl- 

 vania species, with notes on others, 

 is given by Wheatley in Am. Jour. Sci. 

 [2] xxxii.41. 



natural size, of the Clepsysaurus Penn- 



Figs. 645-648. 

 r""'\ 45 



46 Jjlk 46<r 



Fig. 645, Bathygnathus borealis (XK)? 

 646, Palaaosanrus Carolinensis; 646a, sec- 

 tion of same; 647, Clepsysaurus Pennsyl- 

 vania^ ; 648, Rutiodon Carolinensis. 



