278 MONTGOMERY. [Vol. XV. 



Eimer ('75) studied the egg cells of Silurus in eye fluid, 

 and found the nucleolus to present amoeboid movements. 



Kidd ('75) found slow amoeboid movements of the nucleoli 

 of the epithelial cells from the mouth of the frog. These 

 cells wrere placed in humor aqueus, and studied on a stage 

 heated to 39° C. 



A. Schneider ('75) says : " Les nucleoles ne sont pas un 

 element constant de la structure des Gregarines ; beaucoup 

 d'especes en sont normalement privees. Dans les genres 

 Clepsidrina, Euspora, Gamocystis, il n'y a jamais qu'un nucle- 

 ole, permanent, tres-volumineux et spherique. . . . Dans tout 

 ces genres, jamais deux individus ne sont semblables a eux- 

 memes au point du nombre, de la grandeur, de la configu- 

 ration, de I'opacite ou de la transparence de leurs nucleoles." 



F. E. Schulze ('75) noticed in life that an equal division 

 of the nucleolus precedes that of the nucleus, in Amoeba 

 polypodia. 



Auerbach ('76) repeats some of his previous observations 

 ('74) and adds that the nucleoli show a further similarity to 

 the cytoplasm, in that they have a tendency to produce 

 vacuoles. 



Balbiani ('76) describes certain structures in the egg of Steno- 

 bothrus, which may be chromatic filaments, though I may give 

 a brief citation in regard to them in this place. The con- 

 tents of the nucleus in the fresh state appear " rempli de 

 petites hachures pales, tantot paralleles les unes aux autres, 

 tantot distribuees plus ou moins irregulierement dans la cavite 

 nucl6aire. ... A I'aide de I'acide acetique, on s'assure que 

 ces hachures sont ddterminees par les corpuscules en forme de 

 batonnets etroits . . . chaque batonnet parait forme de petits 

 globules r^unis en serie." At the time of nuclear division, 

 these "batonnets" become less numerous but larger. 



Van Beneden in the same year ('76) gives the results of obser- 

 vations on the egg of Astcracanthion. There is one large nucle- 

 olus, and eight to fifteen small "pseudonucleoles." He did not 

 notice amoeboid motions in these, but found change of form 

 and successive re- and disappearance of the nucleoli in Rana, 

 Polystomufft, Gregaritia, and Monocystis. " Mais je ne doute 



