10 COCCOPHYCES. 
** Stem without rings. 
Urococcus Allmanni. Hass. t. 80, f. 3. 
Cells elliptical, blood-red; stem short, rather club-shaped, 
colourless, smooth. 
Rabb. Alg. iii. p. 322. 
Hematococcus Allmanni, Hass. Alg. p. 322. 
In springs at Knaresborough. 
Plate IV. fig. 3. a, cells considerably magnified, after Hassall; 3, 
cells further magnified. 
Urococcus cryptophilus. Hass. ¢. 80, /f. 1. 
Cells small, oval, rarely globose ; tegument very large, con- 
fluent with the short ringless stem. 
Rabh. Alg. iii, p. 32. 
Hematococcus cryptophila, Hass. Alg. p. 324. 
Hematococcus sanguineus, Harv. Man. p. 181. 
Palmella cryptophila, Carm. in litt. 
On stalactites lining a cavern in a quartz rock. 
“Forms wide patches externally of a brick-red colour, but within 
whitish, breaking up easily into the numerous separate portions of 
which each mass is formed. The colour resides alone in the granules ; 
these terminate the superior extremity of the mucous prolongations, 
which are colourless, and arranged almost entirely side by side. The 
granules or cells are several times smaller than in U. Allmannt.”’— 
Hassall. 
Plate IV. fig. 4. a, cells considerably magnified, after Hassall; 0, 
cells further magnified. 
Genus 5. SCHIZOCHLAMYS. Br. (1849.) 
Cells globose (or ovate), either single, or 2-4 associated in 
families; tegument lamellose, as age advances dividing regularly 
in 2-4 equal parts, some time adhering by means of a hyaline 
colourless mucous. Division in one or two directions. Zoo- 
gonidia produced by a repeated division of the cell contents. 
At present represented in Europe by a single species. 
“The globular cells of this little Alga produce a hyaline cell-mem- 
brane, which becomes removed to some distance from the green body 
of the cell by subsequent secretion of fiuidish jelly; soon, however 
(probably from endosmose), becoming unable to withstand the expan- 
sion of the jelly, it splits in the direction of an equatorial circle, by a 
clean line, into two similar halves, or if the dehiscence takes place by 
two circular lines, cutting at right angles, into four similar pieces. 
This splitting and peeling of the membrane either coincides with a 
division of the internal cell-mass, or it occurs without any such division. 
By frequent repetition of this process the cell gradually becomes 
surrounded by an accumulation of old fragments of the membranous 
shell, which are held together by the extremely transparent jelly set 
free. The division of the cell may be either a simple halving, in which 
case each part is immediately clothed again with a hyaline cell-mem- 
brane, or double, through the cells produced by the first division sepa- 
