
PLATE VIL 
PERMIAN VERTEBRATES. 'TRIMERORHACHIS 
Fia. 1, la. Trimerorhachis insignis Cope, 1878. Skull, superior and inferior views, natural 
size. Metatype, Amer. Mus. No. 4557, Cope Coll., Permian, Wichita basin, 
Texas, 
Fias. 2, 2a, 3. ?Trimerorhachis, not identified. 

