2 
Development = 2215 : — 
General 
Oogenesis and Ovum 
Spermatogenesis and Spermatozoon 
Embryology 
Ethology = 2211) : — 
General 
Movements, Locomotion 
Enemies, Defence and Protection 
Feeding Habits 
Breeding Habits 
Coloration 
Habitat 
Acclimatisation, etc. 
Hibernation and ^Estivation 
Parasitism, Commensalism, Parasites, et 
Evolution ... 
Sexual Dimorphism 
Economics ... 
Variation and ^Etiology = 2223 : — 
General Treatises ... 
Teratology, Phylogeny and Relationship 
Evolution 
PAGE 
>24 
Distribution = 2227 : — 
General 
(a) Recent: — 
(«) 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 Ocean 
(/)) Non-Marine : — 
Denmark = 2227 da ... 
Sweden 
Russia = 2227 db 
Holland = 2227 dd ... 
British Islands = 2227 dt 
