21,2 Shaw: Copelandosphaera 221 
The highest number of reproductive cells found after a mod- 
erate search was twenty-five. In material consisting of coe- 
nobia averaging smaller in size than the first lot the average 
number of reproductive bodies is somewhat smaller, and Powers 
(08, p. 145) reported a marked tendency for the coenobia to 
contain exactly eight oogonidia (“ova”), but the number was 
frequently increased to eleven or more. 
The various combinations of reproductive bodies present in 
one hundred coenobia that were sufficiently mature for dis- 
tinguishing between the different kinds, taken as they occurred 
in the preparations, were recorded by Powers with the results 
that are given in Table 3. Sperm spheres alone in mother coe- 
nobia, though not found among any of this hundred, were other- 
wise of not infrequent occurrence. The largest number of 
daughter coenobia observed in one mother was twenty-two. 
The largest number of oospores observed in one coenobium was 
reported as nineteen. The largest number of sperm spheres 
recorded was fourteen, and these were accompanied by two 
vegetative coenobia. 
TABLE 3.—Combinations of reproductive bodies in 100 matured coenobia 
of Copelandosphaera spermatosphaera. 
Number of reproductive bodies, 
Number of mother coenobia. 
daughters. Oospores. spheres, 
Wa csree dates Sete ee ea Re 6s gg ee ee 
Bie 2S Bees ee Sere: BORA So cre ots: 1-11 
so re ee mee eR Es AEN a RRR NG oe 2-13 1-7 1-8 
The gonidia have, accordingly” at the time of differentiation 
diameters of about 9 » (Powers ’07, pl. 13, fig. 13), at the time 
of birth they measure about 15 to 18 » (07, p. 188), and at 
the time of segmentation, which is always considerably later 
than birth, they reach about 30 to 36 uw. Some rare cases illus- 
trated by Powers (’07, pl. 13, fig. 18) of gonidia in which seg- 
mentation was delayed until they had reached a size of 51 pe 
are open to the suspicion of belonging to some other species. 
The segmentation of the gonidia was described as proceeding 
more slowly at first and then rapidly until the somatic cells are 
produced with diameters of about 3 ,, long before the young 
coenobia have closed to form complete spheres (Powers 07, p. 
132). From this time on the somatic cells of the young coe- 
