ILLUSTRATIONS 
[Photomicrographs of Merrillosphaera carteri (Stein) Shaw, from specimens mounted in gly- 
cerine except as otherwise noted, taken by W. R. Shaw and E. Cortes at the Bureau of 
Science, Manila.] 
PLATE 1 
Fic. 1. Type specimen of Merrillosphaera carteri var. manilana. A coeno- 
bium with eight embryo daughters. x 100. 
2. A portion of the coenobium wall and one of the embryo daughters 
of the same specimen as that shown in fig. 1. The embryo 
shows in profile two protruding gonidia. x 200. 
3. A mature asexual coenobium of the same variety as fig. 1, con- 
taining eight female daughters. In four of the daughters the 
oogonidia counted are 24, 27, 31, and 37. x 100. 
4. A nearly mature female coenobium with twenty-nine oogonidia. 
x 100. 
5. A mature asexual coencbium somewhat flattened under a cover 
glass. It contains four asexual daughters and three male 
offspring. The daughters contain eight gonidia each, and the 
male coenobia each about one hundred twelve androgonidia 
that are mostly undivided in the hindmost one and mostly 2- or 
4-celled in the two others. x 100. 
6. A young coenobium with eight gonidia that are 24 to 27 u in 
diameter. x 100. — 
7. A male coenobium with the reproductive bodies developed into 
sperm platelets that are more or less cupped. xX 100. 
PLATE 2 
Fic. 8. A mature asexual coenobium of Merrillosphaera carteri var. 
manilana with eight asexual daughters, each with eight goni- 
dia so far as could be counted. xX 100. 
9. An asexual coenobium of the smaller form. It has nine gonidia 
that measure 53, 55, and 46 ». xX 100. 
10. A young asexual coenobium of the smaller form. It contains 
twelve gonidia very symmetrically arranged. In the forward 
group two are in the middle of the picture, in the second group 
two are at each side, and in the hindmost group two are near 
the middle of the picture. The gonidia of the third group are 
about 28 « wide, and the others about 82 4. There is a notice- 
ably large gap between the second and third groups of gonidia. 
x 100. 
11. An asexual coenobium with only six gonidia. They are symmet- 
rically arranged in a group of four just ahead of the middle, 
and a pair halfway back from them to the hinder pole. They 
all measure about 50 to 53 # x 100. ies 
