TRIASSIC PERIOD. 



427 



branchiae attached to the abdomen. Tracks of different insects are shown in 

 figs. 633-635, from Hitchcock. On comparing especially figs. 633, 634 with 



Figs. 633-637. 



33 



<V 





A 



3i 





\> V 



VI 1 



3e \ V, 



\ 



\ 



\ 



i 



Figs. 633-635, Tracks of Insects; 636, 637, Tracks of Crustaceans? 



the footprints of some living Insects, Dr. Deane found a close resemblance 

 between them. 



3. Vertebrates. — (a.) Fishes.— Tig. 638, Catopterus gracilis Redfield (re- 

 duced one-half), from Middlefield, Ct., and also from North Carolina and Phoe- 

 nixville, Pa.; 638 a, scale of same, natural size. There are also other species 



Fig. 638. 



, Ganoid, Catopterus gracilis ( X X A ); a, Scale of same, natural size. 



of Catopterus ; also species of Ischypterus, and of Turseodus Leidy (related to 

 Belonostomus or Eugnathus). In the last the tail is not at all vertebrated 

 or heterocercal. Radiolepis speciosus Emmons is another Ganoid, from North 

 Carolina and Pennsylvania. 



The best localities of fossil fishes are Sunderland, Mass. ; Middlefield Falls 

 and Southbury, Ct. ; Richmond Coal beds, Va. ; Phoenixville, Pa. 



(b.) Reptiles. — (1.) Amphibians. — Fig. 643, Anisopus gracilis Hk., reduced one- 

 third. Fig. 642, Anisopus Dewey anus Hk., half natural size. Fig. 639, Macropterna 

 divaricans Hk. (reduced to one-sixth), may also be Batrachian. Fig. 644, Oto- 

 zoum Moodii Hk., is possibly allied distantly to the Labyrinthodonts, although 

 differing much from the known Labyrinthodont tracks. Portions of the ske- 

 leton of Labyrinthodont Amphibians have been detected by Leidy among the 



