50 COCCOPHYCE, 
Famity IIT. VOLVOCINEA. 
Ceenobia mobile, globose, subglobose, or quadrangular and 
flattened, produced from agile biciliate green cells, with a double 
contractile vesicle. Common tegument of the ccenobium hya- 
line, more or less ample. 
Propagation sexual or asexual. The sexual monexcoius or 
dizcious, either all or some of the cells of the cenobium ex- 
hibiting male and female characters. Male cells containing 
spermatozoids (antheridia), the female finally changed into a 
quiet oospore. Non-sexual propagation by means of motile 
gonidia (macrogonidia and microgonidia). These arise from the 
simultaneous and repeated division of the cell contents (cytio- 
plasm). Macrogonidia definite in number (2, 4, 8, 16, &c.), 
the larger oblong or rounded, with the anterior extremity more 
or less rostellate, with two cilia exserted through the membrane 
of the vesicle, furnished with a parietal red spot (eye-spot), and 
often two contractile vacuoles. Microgonidia indefinite in 
number, much smaller, pale or dull green, or yellowish, with 
cilia at the apex, mostly even within the mother-cell, endued 
with rapid motion, and ultimately escaping by rupture of the 
membrane. 
Pritchard’s ‘ Infusoria” (p. 144) may be consulted with advan. 
tage, although including some genera which undoubtedly belong to 
Infusoria. Also the various memoirs hereafter referred to under the 
several genera, 
The passage into amzboid conditions has been observed in several 
genera, but this is a subject on which further investigation is needed. 
T. C. White has seen it in Chlamydococcus (‘‘Journ. Quekett Micr. 
Club,” 1879), Archer in Stephanosphera (“ Quart. Journ. Micr. Sci.,” 
1865, p. 127), and Dr. Hicks in Volvow (“ Quart. Journ. Micr. Sci.,’’ 
1860, p. 99, and 1862, p. 96). 
Genus 37, CHLAMYDOCOCCUS. Br. (1849.) 
Cells globose, or subglobose, (4-8 joined in a very fugitive 
ccenobium), cell-membrane thickish, firm, cell contents granular, 
brownish red or vermilion, in certain stages changing into green. 
Macrogonidia 2-4-8 rounded, the frontal extremity bearing 
very long cilia, and furnished with a central reddish nucleus 
and four to six starch granules (not always visible) involved in 
a very ample, hyaline, mostly ovoid tegument. Microgonidia 
much smaller, numerous, yellowish or dull green, the apex 
reddish, biciliate, moving actively within the mother cell, and 
atlast escaping, by rupture of the membrane. 
