No. 3-] EGG OF ALLOLOBOPHORA FOETIDA. 603 



Archoplasm in the Male Attraction Sphere} 



Sometimes the archoplasm is quite uniformly distributed, and 

 again it is represented by rods or rays or granular masses. As 

 these varying forms are seen at the same stage of development 

 of the Qg^, is it not probable that they represent varying 

 expressions of the effect of the fixatives.^ 



An examination of the photos, of eggs killed in corrosive- 

 sublimate (12, 14, 15, 18, 20) reveals a marked similarity in 

 the distribution of the archoplasm. It forms a granular, flocky 

 circle around the male attraction sphere, and this arrangement 

 is relatively constant for corrosive-sublimate preparations. 



A comparison of these with photo. 17 shows a striking 

 difference, and we are forced to conclude that the approxi- 

 mately even distribution of archoplasm in this section is more 

 suggestive of the living condition, because the hyalin globules 

 have not fused, as is probably the case in the corrosive-sublimate 

 preparations, and the action of the fixative must be thus less 

 injurious. In the above list of corrosive-sublimate prepara- 

 tions we did not include photo. 16, for the arrangement of 

 the archoplasm of that section is exceptional — it is more 

 like that shown in photo. 17, and it is a significant fact that 

 the fixation of the rest of the cytoplasm is also more like 

 that of photo. 17, i.e., there has been less fusing of the hyalin 

 globules. The Qgg of photo. 17 was fixed with Hermann's fluid, 

 tvitJiout acetic acid ; the same stage fixed with Hermann, in 

 which the acetic acid had been retained, shows a very different 

 cytoplasmic configuration. 



The archoplasm of photo. 21 (Perenyi's fluid) and of 19 

 (Flemming's fluid strong) is aggregated into decided rays, and 

 there are no indications of the presence of hyalin globules. 



The archoplasm of photo. 7 is more condensed than is the 

 case in any of the other preparations. The fixative used (osmic 



^ We are preparing a paper to demonstrate (with a series of photographs) the 

 presence of the archoplasm throughout the cytoplasm and its homology to 

 the so-called yolk-nucleus. We hope to defend this broader use of the term, em- 

 ployed in an earlier paper, and to support the interpretations there suggested. Foot, 

 "Yolk-Nucleus and Polar Rings," yi7«r«. of Morph., vol. xii, No. i, 1896. 



