PAETS CONCERNED IN REPRODUCTION. 247 



clusively to those of the resulting zooids or phytoids, which 

 represent, or are more or less incorporated with that phase 

 of development to which, in the foregoing pages, the term 

 gamomorphic has been applied.* The other links, which 

 help to make up the entire series intervening between the 

 successive acts of sexual reproduction, are truly neuter 

 that is, not only incapable of exercising sexual functions, 

 but destitute of all trace of sexual organs, and multiplying 

 simply by some modification of the budding process. 



Protomorphic organisms thus isolated from those of the 

 succeeding phases have not yet been shown to have their 

 neutrality even indirectly affected by their giving rise, in in- 

 dividual cases, exclusively, to male or female gamomorphic 

 forms ; but analogous differences have been satisfactorily 

 determined as occurring in the orthomorphic or typical 

 phase. In the vegetable kingdom particularly, they have 

 long attracted the attention of botanists, who apply the 

 term dioecious to species whose sexual phytoids or flowers 

 are exclusively of one sex on any single plant, and that of 

 monoecious to species whose sexual phytoids, though them- 

 selves exclusively either male or female, occur of both kinds 

 in connection with the same plant. A word of the same 

 general character such as synoecious might be devised to 

 distinguish plants bearing bi-sexual flowers, to which as yet 

 no special term has been applied. The expressions might 

 farther be extended with advantage from phanerogamic 

 plants, not only to those organisms like Mosses, and some 

 of the Polypifera, in which the reproductive organs are in 

 obvious connection with the vegetative stock, but to other 

 cases also, in both kingdoms of nature, in which the sexual 

 forms are quite isolated. In the case of Ferns or Polypi- 

 fera, for instance, we should call a species synsecious, in 

 which the prothallia or medusoids are bi-sexual; another 



* Nurses (Amme) of Steenstrup ; Agamozooids of Huxley. 



