2 
Physiology = 1011 : — 
1. General . . 
2. Circulation 
3. Respiration 
4. Alimentation and Digestion 
5. Excretion and Secretion. . 
6. Sensation . . . . . . i . 
7. Miscellanea and Experimental Physiology 
Development = 1015 : — 
1. General principles . . . . . . . . Vacant 
2. General accounts. . . . . . . . . . . . 22 
3. Formation of gonads . . , , . . . . . . 22 
4. Oviposition, Fertilisation, Segmentation . . . . 22 
5. Larval stages . .. .. .. .. .. 22 
6. Organogeny, 4-12, as under 1007 . . . . . . 22 
7. Post-larval g-rowth-stages . . . . . . . . 22 
8. Developmental mechanics and Experimental Em- 
bryology . . . . . . . . . . . . 23 
(a-h, refer to the Classes as under 1031) 
Ethology = 1019 : — 
1. General accounts . . . . . . . . 24 
2. Special habits . . . . . . . . , . Vacant 
3. Habitat . . . . . . . . . . . . . . 24 
4. Feeding . , . . . . . . . . . . 24 
5. Defence and Protection . . . . .... . . . . 24 
6. Locomotion . . . . . . . . . . ..24 
7. Autotomy and Regeneration . . . . . . . . 24 
8. Parasites and Commensals . . . . . . 24 
9. Protection of young . . . . . . . . . . 24 
10. Sexual Dimorphism .. .. .. Vacant 
11. Relation to other animals, as food, etc. . . . . 25 
12. In Geological Aspect . . . . . . . . 25 
13. Phaenology .. .. .. . - .. Vacant 
Variation and Aetiology = 1 023 : — 
1. Variation in form and surfaco characters . . . . 25 
2. Variation in colour .. .. .. .. ..25 
3. Variation, meristic, numerical . . . . . . 25 
4. Variation, meristic, homoeotic . . . . Vacant 
5. Variation, teratological. . .. .. .. .. 25 
6. Variation, bionomic . . . . . . . . . . 25 
7. Variation, mutational . . . . . . , . . . 26 
8. Evolution, general principles . . . . . . . . 26 
9. Evolution, relations to other Phyla . . . . . . 26 
10. Evolution, phylogenetic, of smaller groups ,. .. 26 
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