Tur Editors have been fortunate in obtaining the cooperation of many Zoologists in 
tho Zoological part of their work. The different-subjects, so far as at present 
arranged, have been undertaken as follows :— 
MAMMALIA. By Epwarp R. Auston, F.L.S. 
AVES. By Ossert Satvin and F. DuCane Gopman. 
REPTILIA. By Dr. A. Ginrner, F.R.S., Keeper of the Zoological Department, British 
AMPHIBIA. 
Museum. 
PISCES. 
MOLLUSCA (Land and Freshwater). By Dr. E. von Marrens. 
CRUSTACEA (Freshwater Malacostraca). By Prof. T. H. Huxuny, LL.D., Sec. B.S. 
ARACHNIDA. By Rev. O. Pickarp CaMBRIDGE. 
COLEOPTERA. By H. W. Bares, F.L.S., Rev. HS. Goruam, Martin Jacosy, E. W. Janson, 
Dr. D. Suarp, and C. O. WatrerHouse. 
~ HYMENOPTERA 7. 
LEPIDOPTERA. 
RHOPALOCERA. By F. DuCanre Gopmay and OsBert Savin. 
HETEROCERA. By Hersert Drvcz, F.LS. 
DIPTERA *. 
NEUROPTERA. By R. M‘Lacutan, F.R.S. 
ORTHOPTERA (part). By J. Woop-Mason. 
RHYNCHOTA. By W. L. Distant. 
* No arrangement has yet been male with respect to these subjects. 
The BOTANICAL portion is entirely in th; hands of Mr. W. B. HEMSLEY, A.L.S. 
The Editors will give, at the conclusion of the Work, an Introductory Volume, 
wherein the physical features of the counry will be described and illustrated with 
maps. 
