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Physiology = 1011: — 
1. General., .. .. .. . . . • .. 15 
2. Circulation (vacant) 
3. Respiration .. .. .. .. . . ..15 
4. Alimentation . . . . . . . . . . . . 15 
5. Excretion .. .. .. .. .. ..15 
6. Sensation .. .. .. .. .. ..15 
7. Experimental . .. .. . . ... .. 15 
Development = 1015 : — 
1 . General principles . . . . . . . . . . 15 
2. General accounts . . . . . . . . . . 15 
3. Formation of gonads . . . . . . . . . . 15 
4. Oviposition, etc. . . . . . . . . . . 15 
5. Larval stages . . . . . . . . . . . . 15 
6. Organogeny (vacant) 
7. Post-larval growth-stages (vacant) 
8. Experimental Embryology . . . . . . . . 15 
Ethology = 1019: — 
1. General accounts . . . . . . . . . . 15 
2. Special habits . . . . . . . . . . . . 15 
3. Habitat.. .. .. .. .. .. ..15 
4. Feeding .. .. . . .. .. .. 15 
5. Defence and protection . . . . . . . . 15 
6. Locomotion .. .. .. .. .. .. 15 
7. A utotomy and Regeneration. . .. .. .. 15 
8. Parasites and Commensals . . . . . . . . 15 
9. Protection of young (vacant) 
10. Sexual dimorphism (vacant) 
11. Relation to other animals (vacant) 
12. Geological aspect 15 
13. Phenology (vacant) 
14. Hybridization (vacant) 
Variation and Aetiology = 1023 : — 
1. Variation in form .. .. .. .. .. 16 
2. Variation in colour . . . . . . . . . . 16 
3. Variation, meristic, numerical (vacant) 
4. Variation, meristic, homoeotic (vacant) 
5. Variation, teratological . . . . . . . . 16 
6. Variation, bionomic (vacant) 
7. Variation, mutational (vacant) 
8. Evolution . . . . . . . . . . . . 16 
9. Relations to other phyla (vacant) 
10. Phylogeny .. .. .. .. .. .. 16 
