28 KANSAS UNIVERSITY SCIENCE BULLETIN. 



Zatrachys conchigerus Cope. Permian of Texas. Cope, 1896 — Proc. 



Amer. Phil. Soc, xxxiv, p. 453. 

 Zatrachys serratus Cope. Permian of Texas. Cope, 1878 — Proc. Amer. 



Philos. Soc, xvii, p. 523. 

 Zygosaxirns labyrinthicus Geinitz. Permian of Saxony. See Sclero- 



cephalus labyrinthicus (Geinitz). Geinitz and Deichmuller. Pa- 



leontographica, Bd. 29, p. 16, pis. ii-iii. 

 Zygosaurus lueius Eichwald. Zechstein of Russia. Eichwald, 1848 — 



Bull, de la Soc. imp. des Nat. de Moscou, xxi, p. 159. 



