2 
Physiology = 1011: — 
1. General (vacant) 
2. Circulation (vacant) 
3. Respiration 
4. Alimentation . . 
5. Excretion 
6. Sensation 
7. Experimental . . 
PAGE 
11 
11 
11 
11 
11 
Development = 1015 : — 
1. General principles . . .. . . 
2. General accounts (vacant) 
3. Formation of gonads (vacant) 
4. Oviposition, Fertilisation, Segmentation 
5. Larval stages 
6. Organogeny (vacant) 
7. Post-larval growth-stages 
8. Experimental embryology 
11 
11 
12 
12 
12 
Ethology = 1019: — 
1. General accounts (vacant) 
2. Special habits 
3. Habitat. . 
4. Feeding 
5. Defence and protection 
6. Locomotion 
7. Autotomy and regeneration 
8. Parasites and commensals 
9. Protection of young . . 
10. Sexual dimorphism 
11. Relation to other animals 
12. Geological aspect 
13. Phenology 
14. Hybridization . . 
> ( vacant) 
12 
12 
12 
12 
12 
12 
12 
15. Echinoderms as food . 
. . 
. . 12 
Variation and Aetiology = 1023 
1. Variation in form 
. . 
.. 12 
2. Variation in colour (vacant) 
3. Variation, meristic, numerical (vacant) 
4. Variation, meristic, homoeotic (vacant) 
5. Variation, teratological 
. . 12 
6. Variation, bionomic . . 
• • » , 
. . 12 
7. Variation, mutational .. 
8. Evolution 
# t # 
. . 12 
o • • • 
.. 12 
9. Relations to other phyla 
. . 12 
10. Phylogeny 
. • 
. . 12 
