VOL. XVIII. NO. 2. 



Page 363, lOth line from bottom, before scientific read un. 



372, 8th line from bottom, dele M. D. 



373, 3d line from top, for appears read appeared. 

 " 11th " " " for or read on. 

 " 14th " " " for Its read JSTo. 



375, for geodiferous read cornitiferous. 



ERATA.— VOL. XVIII. NO. 2. 



Page 264, under construction,f^vst line after diameter, read and 9 inches long. 



