6 



not tf)0 numerous) ; Posteml>ryonic Ontogeny ; 

 Metamorphosis ; Alternation of Uenerations ; Cycles 

 of Generations ; Changes during Life. 

 For Cell-structure, and Pi-ocesses, refer to L, '• General 

 Biology, Cytology." 

 0219 Ethology, [Works dealing with one or more of the 

 following subjects, and relating to more than one 

 Branch of the Animal Kingdom.] 



General; PTabits; Migration; Hibernation; Parental Re- 

 lations; Sexual Relations ; Oviposition; Voice; Sound 

 Production; {see also Q, 4140.) Luminosity; {see also 

 Q 02(30.) Cavernicolous Animals ; Pelagic and Deep- 

 sea Animals ; Instinct ; Social Relations ; Psychology; 

 Gregariousness ; Symbiosis ; {see also L 5550 ; Q 0285 ; 

 R2250.) Parasitism; Protection; Colour and 

 Habits ; Defensive Processes ; Resemblances 

 (including Mimicry and Protective Resemblance) ; 

 Ornament; Utility. 

 0223 Variatiox and Etiology. [Works dealing with one or 

 moi'e of the following subjects and relating to more 

 than one Branch of the Animal Kingdom.] {See also 

 (L) General Biology, and (Q) Ph^^siology.) 

 General ; Substantive variation ; size, proportions, form, 

 colour, etc. Meristic variations ; numerical [meristic 

 proper] ; homoeotic. Teratological. Bionomic varia- 

 tion ; of fertility ; of time of appearance ; of 

 maturity ; of development ; of habits. 

 Or indexed alternatively or supplementally, with 

 reference to treatment — desciiptive. statistical, 

 mathematical ; geographical or stational. 



Heredity. Crosses and Hybrids. In-breeding. Tele- 

 gony. Evolution. {See also K 0200 ; L 4300.) 



0227 Geographical Zoology. 



Geographical Distribution. [Works relating to the 



principles and modes of Distribution.] 

 Topographical Zoology. [Works relating to the 

 Fauna of one or more of the sub-divisions used in J, 

 '* Geograph}'." and dealing with more than one of the 

 Branches of Zoology.] 

 0231 Taxonomy or Classification in general. 



[In this are to be placed works dealing with the 

 principles of Zoological classification ; works dis- 

 cussing the classification of more than one of the 

 Branches ; Avorks dealing with the relations of the 

 great groups of existing animals ; Phylogenetic 

 classification, i.e., the relations in time of the great 

 groups of animals. Works relating to the classifica- 

 tion of only one of the Branches are to be dealt with 

 in that Branch.] 



