2 
Development = 2215 : — 
General 
Oogenesis and Ovum 
Spermatogenesis and Spermatozoon 
Embryology 
Ethology = 2219 : — 
General 
Movements, Locomotion ... 
Luminosity... 
Mimicry 
Feeding Habits 
Breeding Habits ... 
Colouration ... 
Habitat 
Boring Habits 
Acclimatisation, etc. 
Hibernation and Aestivation 
Parasitism, Commensalism, Parasites, etc 
Economics ... 
Variation and AEtiolog'y = 2223 : — 
General Treatises ... 
Teratology, Phylogeny and Relationship 
Distribution = 2227 : — 
General 
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(a) Recent : — 
(a) Marine : — 
Arctic Ocean ... 
North Atlantic Ocean, Caribbean Sea and 
Gulf of Mexico 
Mediterranean Sea, Black Sea 
South Atlantic Ocean... 
Indian Ocean, Red Sea 
Malaysia 
N. Pacific Ocean 
S. Pacific Ocean 
Southern Ocean 
Antarctic Ocean 
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(/3) Non-Marine : — 
Denmark = 2227 da ... 
Russia = 2227 db 
Southern Russia = 2227 dbb 
Germany = 2227 do 
Holland = 2227 dd 
British Islands = 2227 de 
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