488 The Philippine Journal of Science 1922 
toplast is filled with a jelly, w and w’. Between the peripheral 
lamella, 0, and the jelly, w, there is a soft mass, u, that differs 
somewhat from the jelly. The “Hiilllamella” and the jelly to- 
gether were regarded by Meyer as constituting the cell wall and 
directly comparable with the cellulose walls of the higher -plants. 
The gelatinous layer of the membrane contains canals that are 
filled by extensions of the protoplast so that the protoplast is 
star-shaped. According to Meyer the cavity of the coenobium 
within the layer of cells is occupied by a watery liquid. Janet 
(12, p. 34) found the interior of the coenobium to be filled 
with a jelly made up of radial columns, one extending to near 
the center from each of the peripheral cells of the coenobium. 
VOLVOX PERGLOBATOR Powers. 
This species was described by Powers (’08) from shallow 
pools in the neighborhood of Lincoln, Nebraska, North America. 
In his paper dealing with the subject he reported it also from 
the following North American localities: Rocheport, Missouri; 
St. Louis, Missouri; New Orleans, Louisiana; the vicinity of 
Ann Arbor, Michigan; and the neighborhood of Sebago Lake, 
Maine. He also reported that material he had seen from the 
states of Washington and Massachusetts probably belonged to 
the same species. The description was without illustrations. 
The form of the coenobium was not stated except for the 
large female coenobia, which were called oval by Powers. The 
Size reached more than 1,000 » in some of the asexual coenobia 
of each of Powers’s collections, while coenobia of 1,200 to 1,400 
# Were readily obtainable, and one old furrowed coenobium of 
1,600 » was measured. Many of the female coenobia from the 
Same source as the largest asexual coenobium were about 1,000 
» in diameter and sometimes larger than this in the longer 
dimension, 
The number of somatic cells was not given, though they were 
characterized as excessively numerous. The characters of these 
cells were stated to coincide closely with those of Volvox globator. 
They were called highly stellate and reported to duplicate the 
figures by Overton (89) and Meyer (’96) of the somatic cells 
of that species. In the oldest sexual coenobia the somatic 
protoplasts became widely separated from one another and their 
cytoplasmic processes extended in irregular bent lines until the 
cell bodies were hardly noticeable and the somatic layer pre- 
