8 



3D 



/. Regressive selection, as when accommodation preserves those of inferior racial 

 endowments. 



Explanation of the signs used in Sections 2 and 3. 



= Equal to. + Combined with. 



V By means of ; produced by; through. 



* Determined by previously attained aptitudes. 



f Determined by previously attained habitudes. 



*t Determined by aptitudes and habitudes. 



J Determined by conditions in the present environment. 



Determined by one or more of these influences. 



TABLES OF FORMS. 139 



3. The Forms o} Selection Defined. 



Reflexive selection, based on relations within the group. 



*fi5. Conjunctional selection, '.' cooperation of individuals especially V the 

 coordination of instincts and habits with qualities. 



(40) Sexual selection'.' coordination of sexual instincts and qualities. g. 



(41) Social selection V coordination of social instincts with qualities. s 

 3 *t(42) Filio- parental selection V coordination between the powers and char- 

 bo acters of the parents, and the size, number, form, and instincts of the 



young. 

 16. Dominational selection '.' power to outdo, outrun, and overcome others 



of the same group in appropriating needed resources. 

 (43) Sustcntational domination ' .' taking food. 

 'C (44) Protectional domination '.' taking positions affording safety. 



(45) Nidificational domination : taking positions for breeding. 



(46) A fating domination '.' monopolizing mates. 



o .5 (47) Prcpotcntial domination '.' superior potency of pollen. 



^ *iy. Impregnational selection '.' structural and physiological coordinations 



2 jS that secure a sufficiency of impregnated germs with least waste. 



g g (48) Dimensional selection ,'.' coordination in length of pistils and pollen 



8 .2 tubes, and in size of other impregnating organs. 



.g (49) Structural selection V coordination of clasping organs, etc. 



j (50) Potential selection ' .' coordination of the sexual elements. 



(51) Fecundal selection ' .' coordination in the relative number of the male p 



female elements preventing waste. 



fi8. Institutional selection V suppression of reproduction for (52) Eccle- P 

 jv 'o siastical, (53) Military, (54) Sanitary, and (55) Penal reasons; or the 



fig. Prudential selection '.' delay of marriage and prevention of reproduction 



for economic and other personal reasons. 2> 



Environal selection '.' relations of the group and the environment. 

 20. Endonomic selection, determined by activities in the group. 3* 



t(56) Habitudinal selection, determined by acquired habitudes. 

 *(5?) Aptitudinal selection, determined by innate aptitudes. J ^ 



|2i. Heteronomic selection, determined by activities in the environment. 



(58) Natural selection, determined by the irrational environment. 



(59) Artificial selection, determined by the rational environment. 



