62 
HALLY JOLIVETTE SAX 
it is distributed. However, there can be no question from the figures 
described for Geoglossum by the writer (i8) that the rays actually bend 
down toward the nucleus in order to form the membrane. The long 
duration of the period when the interastral zone is formed by the rays, 
which run out radially from the center in all directions, renders 
Eraser's theory quite untenable. 
Overton (22) has described spore formation in Thecotheus pelletieri^ 
a thirty-two-spored form. He found it to be similar in general to 
that described by Harper for the few-spored forms. In Thecotheus 
thirty- two nuclei were formed before delimitation. Ramlow (23) 
reports a similar method of spore formation in Theleholus. The spores 
are delimited after many nuclei are formed. 
Lewis (19) studied the development of the ascus in Pleurago 
zygospora, a sixteen-spored form. The nuclei in this case undergo 
the usual three divisions, producing eight nuclei, after which delimita- 
tion occurs. The spore then elongates to form a filament which 
subsequently divides to form two spores. 
While carrying on some experiments on the light reactions of 
Piloholus crystallinus at the University of Wisconsin, it was noted 
that after a culture had been in use for several days, there appeared 
on the glass used in the experiment some black masses much smaller 
than the sporangium of Pilobolus. A further examination revealed 
the fact that these spots contained the spores from a Pyrenomycete. 
At first this fungus covered the surface with delicate hyphae, which 
increased until the culture was coated with a white mat of mycelia. 
Gradually there developed from this mycelium many black flask- 
shaped fruiting bodies. At first these appeared as little black specks 
on the white mycelium, but later they covered it in great numbers. 
The Pilobolus died out as this Pyrenomycete grew. In connection 
with the work on Pilobolus, which demanded that the glass on which 
the spores were found be placed at varying distances from the culture, 
it was noted that this fungus, as well as Pilobolus, could throw its 
spores a considerable distance and that they were discharged toward 
an illuminated spot. 
The asci from the pyrenocarp contain many spores. It was 
found that they did not agree with the description given for any 
known species. The material was sent to Dr. Rehm for identification. 
Rehm described it as a new species and gave it the name Philocopra 
coeruleotecta Rehm. 
