ERRATA. 



Page 3, 12th. line, for "tells him," read "tells us." 



Page' 14, 6th. line, dele semicolon, and insert comma after 



"creation." 



Page 16, last line, for "imaginable," read "unimaginable." 

 Page 35, 5th. line from bottom, read "cattle are descended," 



and 3rd line, read "thinks are descended." 

 Page 39 et seq., for "Woollaston," read "Wollaston." 

 Page 83, for "Comptes Rendues," read "Comptes Rendus." 

 Page 114, 8th. line, for "humeras," read "humerus." 

 Page 145, 10th. line from bottom, for "then," read "than." 

 Page 151, 3rd. paragraph, 2nd. line, transfer the comma after 



"uses" to the following word. 

 Page 155, 6th. line, full stop after "grub." 

 Page 157, llth line from bottom, read *'as those of the arm." 

 Page 178. Dr. Maclean informs me that the larva of A. iris 



does not enclose itself in, but that it reposes on a web. 



