LOCATIONAL TEEMS, CYTOLOGY OF DESCENT 127 



factors, or determinants necessary to the production of an individual 

 (except, of course, the environmental ones), of which the chromosomes 

 are the familiar example, expressed in some physical form, often, 

 though not necessarily, of definite conformation. It is assumed that 

 these factors belong to two classes, having opposite, vital, chemical, 

 or physical properties. By synecdoche the word syncyst may also 

 designate a gone, individual or species containing, or characterized by 

 syncysts; similarly throughout the series of terms. In dicysty the 

 inheritance mechanism is such that the full complement of factors 

 necessary to the production of an individual is distributed to func- 

 tional cells of two kinds, the macro-(" female") and micro-("male") 

 gametes, neither normally capable of producing an individual, but which, 

 pairing, form zygotes capable of producing an individual. 



Syncystic. Of, or relating to, a gonic cell containing all the factors necessary 

 to the production of an individual, as in the parthenogenetic ovum. The 

 word syncystic may also be applied to a gone, individual, or species bearing 

 syncysts. Syncysty, state of being syncystic; and so with the following 

 five words. 



Dicystic. Of, or relating to, a gone bearing in separate cells the different fac- 

 tors necessary for the production of an individual; as in syngones. The 

 word dicystic may also be applied to individuals and species. 



Amphicystic. Of, or relating to, an individual in which the different groups of 

 factors necessary for the production of a new individual occur in separate 

 cells that are in separate gones; as in many hermaphrodites. 



Telecystic. Of, or relating to, amphicystic species in which the different groups 

 of factors necessary for the production of an individual are borne in separate 

 cells in separate gones that are in separate somas or individuals; as in all 

 bisexual forms. 



Homocystic. Having or producing gonic cells all of the same kind. 



Heterocystic. Having or producing gonic cells of more than one kind. 



Syncyst. A gonic cell, or by synecdoche, a gone, individual, or species, present- 

 ing syncysty. 



Dicyst. A gone, or by synecdoche, an individual or species, presenting dicysty. 



Amphicyst. An individual or species presenting amphicysty. 



Telecyst. A species presenting telecysty. 



Heterocyst. An individual or species presenting both amphicysty and syncysty. 

 or both dicysty and amphicysty, etc. 



Homocyst. A species presenting uniformity in the space relationships of its 

 different kinds of gonic intracellular reproductive elements. 



Kinetocyst. A gonic cell whose elements are active, aggressive, or "male." A 

 "male" gamete; a spermatozoon. 



Statocyst. A gonic cell whose elements are passive, or "female." A "female" 

 gamete; an ovum. 



