PERMIAN. 417 



Eryops, Cope; 1. c, 1877, p. 188. 



E. megacephalus, Cope; 1. c. Rhachitomus valens, Cope; 1. c, 1878, p. 526. 

 E. erytholiticus, Cope; 1. c, 1878, p. 515 (Epicordylus) ; Trans. Amer. Phil. 

 Soc, 1886, PI. I, Fig. 1. 



E. ferricolus, Cope; 1. c, 1878, p. 521 (Parioxys). 

 Acheloma, Cope; Proc. Amer. Phil. Soc, 1882, p. 455. 

 A. cumminsi, Cope; 1. c, 456. 

 Anisodexis, Cope; 1. c, 1882, p. 459. 

 A. imbricarius, Cope; 1. c. 



Microsauri. 



Diplocaulus, Cope; Proc. Amer. Phil. Soc, 1877, p. 187; 1882, p. 541. 

 D. magnicornis, Cope; 1. c, 1882, p. 453. 



Embolomeri. 



Cricotus, Cope; Proc. Acad. Sci., Phila., 1876, p. 405; Proc Amer. Phil. 

 Soc, 1884, p. 29. 



C. crassidiscus, Cope; Proc. Amer. Phil. Soc, 1884, p. 29. 



C. heteroclitus, Cope; 1. c, 1878, p. 522; Amer. Naturalist, 1884, p. 39. 



C. hypantricus, Cope; Proc Amer. Phil. Soc, 1884, p. 30; Trans. Amer. 

 Phil. Soc, 1886, p. 253, PI. I, Figs. 2 and 6. 



REPTILIA. 



* Theromorpha. 

 Clepsydropidse. 



Clepsydrops, Cope; Proc Acad. Phil., 1876, p. 404. 

 C. natalis, Cope; Proc. Amer. Phil. Soc, 1878, p. 509. 

 C. macrospondylus, Cope; 1. c, 1884, p. 35. 



C. leptocephalus, Cope; 1. c, 1884, p. 30. 



Dimetrodon, Cope; Proc Amer. Phil. Soc, 1878, p. 512, 1. c, 1880, p. 42, 

 et infra. 



D. gigas, Cope; 1. c, 1878, p. 513; 1. c, 1880, p. 44. 

 D. inctsivus, Cope; 1. c 



D. rectiforrnis, Cope; 1. c, p. 514. 



D. semiradicatus, Cope; Bull. U. S. Geol. Survey Terr., 1880-81. 

 Naosaurtts, Cope; Amer. Naturalist, 1886, p. 545, et infra. 

 N. cruciger, Cope (Dimetrodon cruciger); Proc. Amer. Phil. Soc, 1880, p. 

 44; Amer. Naturalist, 1878, p. 830. 



N. claviger, Cope; Amer. Naturalist, 1886, p. 545, et infra. 



