ORIGIN OF CHLOROPHYLL, 285 
thought to be due to the absence of spermogonia. In these instances 
of abortion the walls of the trichogynial cells become somewhat 
thinner, and their contents collect in the direction of the long axis. 
In Physma hermaphroditism is seen, the same organ producing first 
spermatia, and afterwards ascogonia and trichogynes. 
moir concludes with a short comparison of the development 
of the spore-fruit of Lichens with that of other Ascomycetes and of 
Floridez. 
Before finishing this short notice, we must take the opportunity of 
remarking that Dr. Stahl’s comparison of the germination of spermatia 
with the artificial emission of pollen-tubes in solutions of sugar, is 
overthrown by the culture-experiments of Cornu, who asserts that he 
was successful in reproducing individuals from spermatia alone, 
s. 
Origin or CHLOROPHYLL 1N THE CoTyLEDONS oF PHASEOLUS VULGARIS. 
Ueber die Entstehung der Chlorophyll in den Keimblattern von Phaseolus 
garis. Von Dr. G. Hasertanpt. Botanische Zeitung. June. 
Tue great father of modern botanical microscopy, H. von Mohl, con- 
sidered that three substances usually go to the composition of chloro- 
 phyll; the colouring matter, a substance not becoming blue under 
influence of Iodine, which he suspected to be of protein nature, and 
starch which may, however, sometimes be absent. With regard to the 
advocat himself, shows some discrepancy with the 
conclusions of the older physiologist. In the resting condition the 
cells of the cotyledons are h mostly simple starch-grains 0 
” removal o: testa, wei fa glass dish cove 
With moist filter paper, and a bell glass was put on the glass in such 
