147 



dorsata of Barrande, which so nearly resembles the Centron- 

 ella glans-fagea that it might readily be mistaken for that 

 shell. On cutting and macerating specimens of the former 

 they prove to possess internal spires arranged as in Meris- 

 tella, removing it from the family of the Terebratulidse. I 

 have not been able to determine whether the shell of this 

 species is punctate or fibrous from the specimens I possess. 



