21,2 : Shaw: Copelandosphaera 213 
the condition of the two kinds of coenobia before and at the time 
of birth. . 
Specimen 9.—A very nearly mature coenobium (not figured) 
with one sexual and five asexual daughters is very much shrunken, 
though the daughters are not. The sexual daughter measures 
257 by 287 y, has somatic protoplasts about 3.5 », and numerous 
oogonidia of about 12 ». The largest asexual daughter mea- 
sures 272 » each way and has six gonidia of which some are 
undivided and others divided into two cells. These gonidia 
measure about 20 to 22 ». The smallest daughter measures 
215 by 236 » and has seven gonidia that measure about 18 pe 
Specimen 10.—An overmature coenobium (not figured) with 
two remaining daughters, both asexual. The mother is much 
snrunken and has large holes in the wall. The daughters are 
terete. One daughter presents a side view and measures 280 
by 310 », and contains ten embryos that are 8-celled and mea- 
sure about 25 ». The embryos of the other daughters are 
of the same number, size, and stage. 
Specimen 11.—A glycerine preparation of material from Pond 
E in Pasay on October 12, 1914, bears an abundance of material 
of this species of which one specimen should be noted here. 
It is a very mature, somewhat shrunken coenobium (not figured) 
with three remaining daughters caught at the time of fixing 
the material in the act of passing out, each through its own 
hole in the wall of the mother. About one-fourth to one-third 
of each is out. The two sexual coenobia are coming out for- 
ward end first, and the asexual one is coming out hind end first. 
The asexual daughter measures 345 by 385 » and contains seven 
embryos that are 8- or 16-celled and measure 29 p» wide. The 
sexual daughters measure 365 by 440 » and 370 by 460 p» and 
have numerous oogonidia of about 15 to 17 pw and of about 
14 », respectively. 
In the young sexual coenobia that have been described the 
reproductive cells are all of about the same size in each coeno- 
bium, and have apparently been formed from cells of the body 
layer after the last cell division of growth, for the vacant space 
left when the oogonidial protoplast sank below the level of the 
somatic layer is not much larger than that occupied by each 
neighboring somatic cell. The gonidia, on the other hand, 
appear to have been differentiated before the last division, but 
precisely when is still an unanswered question. 
