686 



HISTORICAL GEOLOGY. 



Nautilus, a Goniatites, a species of MedUcottia (Fig. 1122), and other Ammon- 

 ites of the geneva. Ptychites, Popanoceras, and }Vaagenoce7'as, which are 

 Permian in Russia and India. 



2. Crustaceans, Insects. — A Trilobite, of the genus Phillipsia, has been ob- 

 served in the Permian of Missouri (Swallow); and a Cockroach, Gerdblattina 

 balteata Scudd., in West Virginia and Ohio beds. 



. 1123. 



1123 a. 



Amphibian. — Eiyops megacephalus (x J). Cope, '81. 



3. Vertebrates. — To Fishes and Amphibians the Permian beds of America, 

 like those of Europe, added Reptiles. 



