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 were placed in humor aqueus, and studied on a stage 
heated to 39 0 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 , Enspora , 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 Topacite 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- 
bothruSy 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 distributes plus ou moins irregulierement dans la cavite 
nucleaire. ... A Taide de Tackle acetique, on s’assure que 
ces hachures sont determinees par les corpuscules en forme de 
batonnets etroits . . . chaque batonnet parait forme de petits 
globules reunis en strie.” 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 Asteracanthion. 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 , 
PolystomuMy Gregarina, and Monocystis. “ Mais je ne doute 
