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EXPLANATION OF PLATE X^' 



'' J- 



Figs. I, 2, 



Straparolhis niagnificiis^ Shumard. 

 The type specimen here figured is in the collection of Dr. 

 A. Litton of St. Louis, and was sent to him from Tennessee 

 by his brother, who obtained it from a person who stated that 

 it was found in Kentucky ; but Dr. Shumard believes that it 

 belongs to some one of the divisions of the Carboniferous Sys- 

 tem. It was first described by Dr. Shumard in the Transac- 

 tions of the Academy of Science of St, Louis, vol. ii., p. no, 

 but not figured. 



Fig. 4, Brachymctopns an/iatus, Vogdes, nat. size. 

 " 5, the same, pvgidiiiiii enlarged ih times. 



