GLOSSARY 441 



Ergastoplasm (i pyd^o/xai. to work). Nearly equivalent to the " kinoplasm " of 



Strasburger and the "• ergoplasm " of Davidoff. The more active protoplasmic 



substance from which fibrillar formations arise. (Garnier, 1897.) 

 Ergoplasm ('ipyov, work). The active protoplasm of the egg (in tunicates), mainly 



derived from the achromatic part of the germinal vesicle, and giving rise in part 



or wholly to the polar spindle. Analogous to archoplasm and kinoplasm. 



(Davidoff, 1889.) 

 Erythro'philous {ipvdp6<;, red: (^lyeiv, to love), having an especial affinity for red 



dyes. (AuERBACH.) 

 Ga'mete {yap-iTr), wife ; yu/AerT/s, husband), one of two conjugating cells. Usually 



applied to the unicellular forms. 

 Gem'mule (see Pangen), one of the ultimate supra-molecular germs of the cell 



assumed by Darwin. (Darwin, 1868.) 

 [Ge'noblasts] (ye'vos, sex ; /^Aao-rds, germ), a term applied by Minot to the mature 



germ-cells. The female genoblast (egg or " thelyblast ") unites with the male 



(spermatozoon or " arsenoblast") to form an hermaphrodite or indifferent cell. 



(Minot, 1877.) 

 Germinal spot, the nucleolus of the germinal vesicle. (Wagner, 1836.) 

 Germinal vesicle, the nucleus of the egg before formation of the polar bodies. 



(PuRKiNjE, 1825.) 

 Germ-plasm, the .same as idioplasm. (Weismann.) 

 Heterokine'sis (ere/aos, different), qualitative nuclear division ; a hypothetical mode 



of mitosis assumed to separate chromatins of dilTerent quality ; opposed to 



homobkinesis or equation-division. (Weismann, 1892.) 

 Heterole'cithal (erepos, different : XcKt^o?. yolk), having unequally distributed 



deutoplasm (includes telolecithal and centrolecithal). (Mark, 1892.) 

 Heterotyp'ical mitosis (erepo?, different ; see Mitosis), that mode of mitotic 



division in which the daughter-chromosomes remain united by their ends to form 



rings. (Flemming. 1887.) 

 [Holoschi'sis] (oAos, whole; crxt'^etv, to split), direct nuclear division. Amitosis. 



(Flemming, 1882.) 

 Homole'cithal (o/xd?. the same, uniform ; AcKt^o?, yolk), equivalent to alecithal 



Having little deutoplasm, equally distributed, or none. (Mark, 1892.) 

 Homookine'sis or Homaeokine'sis (o/aos, the same), equation-division, separating 



equivalent chromatins ; opposed to heterokinesis. (Weismann, 1892.) 

 Homoeotyp'ical mitosis (d/xotos, like ; see Mitosis), a form of mitosis occurring 



in the secondary spermatocytes of the salamander, differing from the lisual type 



only in the shortness of the chromosomes and the irregular arrangement of 



the daughter-chromosomes. (Flemming. 1887.) 

 Hy'aloplasma (JaAos, glass ; 7rAao-/xa, anything formed), i. The ground-substance 



of the cell as distinguished from the granules or microsomes. [Hanstein, 1880.] 



2. The achromatic substance of the nucleus in which the chromatin-particles are 



embedded. (Strasburger. 1882.) 3. The ground-substance as distinguished 



from the reticulum or " spongioplasm." (Leydig. 1885.) 4. The exoplasm or 



peripheral protoplasmic zone in plant-cells. (Pfeffer.) 

 Hy'alosomes ({laAos, glass ; a-wpu, body), nucleolar-like bodies but slightly stained 



by either nuclear or plasma stains. (Lukjanow, 1888.) 

 [Hy'groplasma] (vyp6<;, wet; Tr\a(Tp.a, something formed), the more liquid part 



of protoplasm as opposed to the firmer stereoplasm. (Nageli, 1884.) 

 Id, the hypothetical structural unit resulting from the successive aggregation of 



biophores and determinants. Identified by Weismann as the chromomere, or 



chromatin-granule. (Weismann, 1891.) 

 Idant, the hypothetical unit resulting from the successive aggregation of biophores. 



