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Development = 2215 — 
General . .» ... o.. ••• 
Oogenesis and Ovum 
Spermatogenesis and Spermatozoon 
Embryology 
Parthenogenesis 
Experimental ... 
V29 
Ethology = 2219 : — 
General 
Movements, Locomotion 
Enemies, Defence and Protection 
Feeding Habits 
Breeding Habits 
Boring Habits 
Erosion 
Behaviour under certain conditions 
Coloration ... 
Luminosity... 
Habitat ... ... ... ... 
Adaptation to surroundings 
Acclimatisation, etc. 
Hibernation and ^Estivation 
Special Habits 
Autotomy and Regeneration 
Parasitism, Commepsalism, Parasites, et 
Evolution ... 
Economics ... 
... ^ 30 
• • • 
Variation and ^Etiology = 2223 : — 
General Treatises ... 
Teratology, Phylogeny and Relationship 
Evolution 
Variation in Form... 
Variation in Colour 
Distribution = 2227 : — 
(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 
Pacific Ocean 
Southern Ocean 
Antarctic 
