386 Annals of the Carnegie Museum. 



The Dermal Covering of Trachodon. 



The writer has recently described and figured certain impressions of 

 the dermal covering of Trachodon preserved in a block of sandstone 

 containing a portion of the pelvic and caudal regions of a skeleton of 

 one of these dinosaurs found in the Laramie deposits of Converse Co., 

 Wyoming." At the same time the claim was made that this was the 

 first published description concerning the dermal covering of dino- 

 saurs. I have since discovered that Professor Cope had already in Dec. 

 1S85 ^* published a description with figures of dermal impressions from 

 the same region of the body as those described by the writer and per- 

 taining to the same species TracJiodon {Dicloniiis) mirabilis Deidy. 



J. B. Hatcher. 

 Carnegie Museum, Pittsburg, Pa., 

 Sept. 28, 1901. 



2' See Science, N. S., Vol. XII., Nov. 9, 19CO, pp. 719-720. 

 «SeeAm. Naturalist, Vol. XIX., p. 1208, XXXVII. 



