iv 
PEEFACE. 
Prussia, Italy, and Germany, we have received many complimentary 
opinions, but these expressions will be to us only the incentive to do 
better work to more richly deserve them. For contributions to the 
present volume our best thanks must be offered to Sir Roderick 
Murchison, Mr. C. Carter Blake, Mr. Pengelly, Mr. J. Elliott, Mr. 
S. P. Woodward, Mr. Andrew Taylor, Dr. Eubidge, Professor T. 
Eupert Jones, Mr. \Y. Murray, the Eev. S. Lucas, Count Marschall, 
Director Haidinger, Professor King, Professor Huxley, Professor 
Busk, Professors Dana and Silliman, Mr. Du Noyer, Mr. Guppy, 
Mr. Wyatt, Dr. Wilkins, Mr. James Plant, Mr. Bensted, Mr. John 
Taylor, Dr. Gibb, Eev. Hugh Mitchell, Professor Ansted, Professor 
Harkness, Mr. Charles Moore, Mr. "Wynne, Mr. Sorby, Mr. David- 
son, Mr. C. B. Eose, Eev. J. Crompton, and Mr. W. Bollaert. 
S. J. MACKIE. 
