11 
The complete volume consists of separately paged divisions 
These may be obtained singly, in paper covers, stitched and lettered. 
The following are the divisions and their net prices, viz. : — 
Comprehensive Zoology 
Protozoa 
Porifera or Spongida 
Ccelenterata ... 
Echinoderma... 
Yermidea 
Brachiopoda and Bryozoa ... 
Mollusca 
*Arthropoda (General) 
Crustacea 
Trilobita, Arachnida, Myriopoda 
Insecta 
Prochordata 
*Vertebrata (General) 
Pisces 
Reptilia and Betrachia ».. 
Aves 
Mammalia 
List of New Genera... 
8. d. 
2 6 
2 0 
2 0 
2 0 
3 6 
3 0 
2 0 
4 0 
2 0 
2 6 
3 6 
12 0 
1 6 
1 6 
2 6 
2 6 
6 0 
2 6 
2 0 
* The general titles, Arthropoda, are also bound with the 
Divisions Crustacea, Trilobita-Arachnida-Myriopoda and Insecta. 
The general titles, Yertebrata, are also printed with the Divisions 
Pisces, Batrachia-Reptilia, Aves and Mammalia. Purchasers of any 
of these special Divisions do not require to order separately the 
general Divisions in question. 
There is no Arthropoda (General) in Vol. 52. 
P. CHALMERS MITCHELL, 
Secretary , 
Zoological Society of London, 
Regent’s Park, 
London, N.W. 8. 
July , 1917. 
