6 COCCOPHYCE, 
** Species red or brownish. 
Pleurococcus miniatus. (Kutz) Nag. Hinz. Alg. p. 65. 
Cells very variable in size, globose, usually single, rarely 2-4 
in a family, seated on a broadly effused red stratum, which is 
more or less gelatinous. Cell-membrane rather thick, colour- 
less, hyaline, contents oleaginous orange. 
Size. Cells -0037-016 mm. ( Rabh.), (0035-015 mm. (Kirch.). 
Rabh. Alg. iii. p. 27. Rabh. Exs. 31, 368,1777. Kirch. 
Alg. Schl. p. 115. 
On the walls of conservatories, all the year. 
_ This is one of the species in which Braun has observed the “ skinning 
off” of the outer cell-membrane. 
Nageli ascribes the red colour occurring in many Palmellacee, partly 
as anormal, partly as an abnormal phenomenon, to the formation of an 
orange-coloured oil in the place of the chlorophyll.* Braun says that 
probably all these have the power of retaining their life a long time in 
the dried condition ; in the above species at least, he is quite sure of it. 
The brownish-red colour often acquired by Protococcus viridis may pro- 
bably be explained in the same way.f 
Plate 11. fig.5. Cells magnified 400 diam. 
Pleurococcus roseo-persicinus. abh. Aig. 111., 28. 
Aquatic. Cells unequal, cloudy, single or binate, tegument 
hyaline, collected on a thin, rather gelatinous peach-rose coloured 
stratum, 
Sizz. Cells -0015--004 mm. 
Protococcus roseo-persicinus, Kutz. Tab. i. t. i. 
Clathrocystis roseo-persicinus, Cohn, Beitr. iii. (1875), t. 6, 
f. 1-10. 
Tnvesting submerged aquatic plants. 
This very minute species, with cells of a peach colour, is not un. 
common about the aébris of decaying plants in pools. The cells are 
usually agglomerated in spherical or elliptical masses. Certainly not a 
good Pleurococcus. 
Plate II. fig. 6. Cells magnified 400 diam. 
GENUS 3. GLZZOCYSTIS. Nag. (1849.) 
Cells globose or oblong, either single or 2-4-8, associated in 
globose families. Common and special integuments gelatinous, 
lamellose. Division in alternate directions, Propagation by 
zoogonidia. 
The lamellose tegument distinguishes the species of this genus from 
Plewrococcus. Its analogue in the Phycochromacee is Gleocapsa. 
* More or less green. 
Gleocystis ampla. Kutz. 
Thallus gelatinous, rounded, lobed, dirty green. Cells glo- 
bose, or rounded oblong, 2-4-6 (rarely 8), associated in fami- 
lies; tegument colourless, gelatinous, distinctly concentrically 
stratose. Contents green, granular. 
* Hinzelliger Alge, p. 9. + “ Rejuvenescence,” p. 213, note. 
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