20, 5 Shaw: Janetosphaera and Volvox 489 
sented the appearance, under a moderate magnification; of a 
spongelike reticulum. Powers was able to observe perfectly the 
extremely delicate connecting fibrils such as Meyer had found 
to, form connections between the cytoplasmic processes of neigh- 
boring protoplasts. 
In some instances pairs of neighboring somatic cells were found 
with protoplasmic processes that quite penetrated the cell mem- 
branes and united the protoplasts by a bridge of cytoplasm that 
was little narrower than the diameters of the protoplasts. 
These would seem to be cases in which the cell divisions had never 
been normally completed. 
In regard to the gonidia and the development of the asexually 
produced coenobia no particulars were given. 
The sexual coenobia were dioecious, the separation of the sexes 
being uniform. Among thousands of coenobia Powers found 
but a single exceptional instance. That was an enormous female 
coenobium loaded with oospores which showed on one side a 
single well-developed antheridium, while near it a vacant space 
was evidence of the discharge of the contents of another. The 
combination of oogonidia or androgonidia in the same coenobium 
with gonidia is in this species only an anomaly. Powers saw but 
three such coenobia. 
The oogonidia were produced in large numbers, often exceed- 
ing 100 in poorly developed material, while in the material first 
obtained there were not infrequently between 300 and 400. 
Powers believed that counts would show considerably higher 
numbers. There was a small area of purely somatic cells about 
the anterior pole of the female coenobium. The oospores were 
described as crenate zygotes. 
The male coenobia varied greatly in size, number, and manner 
of development. Sometimes they developed all their antheridia 
nearly simultaneously, at other times their development was 
Spread over a considerable period, nearly all stages being pres- 
ent at one time. Old coenobia were found that were almost 
devoid of androgonidia or antheridia, all or nearly all of the 
Spermatozoids having been discharged. In most of the coenobia 
the number of antheridia was very high, there being usually 
from fifty to one hundred fifty androgonidia or antheridia in 
one coenobium. : 
The antheridia are hollow, globular bodies, strangely like a 
minute coenobium. As the sperm cells become developed into 
Spermatozoids the globular body becomes much flattened, re- 
