The Editors have been fortunate in obtaining the cooperation of many Zoologists in 

 the Zoological part of this Work. The names of the Authors of the different 

 subjects already finished and in progress will be found on the third and second 

 pages of this wrapper. The remaining subjects, so far as at present arranged, 

 have been undertaken as follows : — 



AMPHIBIA. 3 By Dr. A. Gunther, F.R.S., Keeper of the Zoological Department, British 

 PISCES. ) Museum. 



MOLLUSCA (Land and Freshwater) . By Dr. E. von Martens. 



ARACHNIDA ( Arachnidea) . By Rev. O. Pickard Cambridge, F.R.S. 



COLEOPTEEA. By E. W. Janson and Dr. D. Sharp. 



NEUROPTERA. By R. M'Lachlan, F.R.S. 



ORTHOPTERA. By H. de Saussure. 



The Editors will give, at the conclusion of the Work, an Introductory Volume 

 wherein the physical features of the country will be described and illustrated with 

 maps. 



