DECIMAL CLASSIFICATION 
591.16 
101 
162 
163 
.165 
.166 
167 
168 
169 
I7 
171 
172 
179 
18 
10 
2 
3 
33 
34 
35 
26 
3 
41 
A.2 
43 
l 1 
y. 
46 
47 
48 
49 
£ 
51 
F2 
3X 
55 
56 
57 
58 
50 
Generation 
Abiogenesis BE 
Parthenogenesis, neuters ~~ ~ 
Metagenesis, pedogenesis, nurses 
Fission and gemmation 
Fecundation 
Hermaphrodites 
Vivipara 
Superfetation 
Histogenesis 
Development of sperm cells’ 
Development of germ cells, micropyle 
Reparation of wounds 
Nervous functions and sensation 
Physiologic chemistry 
Pathology 
Embryology 
Development of embryo 
Metamorphosis, larva, pupa, molting 
Hypermetamorphosis 
Production of sexes 
See also 575.0 Origin of sexes 
Morfology Comparativ anatomy Homologies 
Circulatory organs 
Respiratory organs 
Nutritory organs 
Secretory and excretory organs 
Generatory organs 
Motory organs 
Nervous system 
[ntegument © Dermoskeleton Skeleton 
Habits and behavior 
Including popular books; animal stories, except fiction 
Instinct Reason 
Abode Migration 
Food 
Seasons Hibernation 
Sociability 
Philoprogenitivness Breeding 
Means of protection Fascination 
Other habits