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Development = 2215 
General ... 23 
Oogenesis and Ovum ... ... ... ... ... 23 
Spermatogenesis and Spermatozoon ... ... ... 23 
Embryology ... ... ... ... ... ... 23 
Ethology = 2219 : — 
General 
Movements, Locomotion ... 
Migration ... 
Enemies 
Feeding Habits 
Breeding Habits ... 
Colouration 
Habitat 
Boring Habits 
Acclimatisation, etc. 
Hibernation and ^Estivation 
Parasitism, Commensalism, Parasites, etc 
Economics 
Variation and ^Etiology = 2223 
General Treatises 24 
Teratology, Phylogeny and Relationship ... ... 24 
. 23 
. 23 
. 23 
. 23 
. 24 
. 24 
. 24 
. 24 
. 24 
. 24 
. 24 
. 24 
Distribution = 2227 : — 
General ... ... ... ... ... ... ... 24 
(a) Recent: — 
(a) Marine : — 
Arctic Oceau ... 
North Atlantic Ocean, Caribbean Sea and 
Gulf of Mexico 
Mediterranean Sea, Black Sea 
South Atlantic Ocean... 
Indian Ocean, Red Sea 
Malaysia 
Pacific Ocean ... 
Southern Ocean 
Antarctic Ocean 
(j3) Non-Marine : — 
Denmark = 2227 da ... 
... 25 
Sweden 
... 25 
Russia = 2227 db 
... 25 
Germany = 2227 dc 
... 25 
Holland = 2227 dd 
... 25 
British Islands = 2227 de 
... 25 
24 
24 
24 
24 
24 
24 
24 
24 
24 
25 
