54 COCCOPHYCE. 
The foregoing life-history is somewhat abridged from the account 
given by Braun (‘‘ Rejuvenescence,” pp. 206-214), and for further de- 
tails the reader is referred to the Memoir by Flotow (‘Nova Acta 
Natura Curiosorum,” Vol. xx. p. 11), and that by Cobn (translated in 
“ Memoirs ” by the Ray Society, 1853), which will furnish all that can 
be required, and are really exhaustive. For remarks on an Amaboid 
condition see paper by T. Charters White in the “Journal of the 
Quekett Microscopical Club” for 1879. 
Plate XXT. fig. 1. a, still cells x 400; 5, green cell with chloro- 
phyll vesicle, and reddish nucleus; ¢, @ cell which had been dried six 
years, undergoing segmentation after revival; d, completed division ; 
e, division into four; f, naked green zoospore; g, encysted zoospore ; 
h, primordial cell, commencing division in two; %, encysted zoospore, 
which has deliquesced; j, primordial cell dividing in four; 4, encysted 
zoospore in still condition; J, division of still cell into 8 cylindrical 
zoospores ; m, escaped zoospore; n, division of encysted cell into 4; 
v, division into 8; y, division into 32; gq, zoospores from the latter form 
escaped from mother-cell; , large red still cell dividing into segments ; 
s, red encysted cell; ¢, yellow-green still cell. All after Cohn. 
Chlamydococcus nivalis, Br. Rejuv. p. 206. 
Cells globose, red, at first with a hyaline border, which is the 
thickened epispore, which gradually disappears with age. 
Size. Cells :01--03 mm. diam. 
Rab. Alg. Eur. iii. 93. 
Hematococcus nivalis, Ag Icon. Alg. t. 31. 
Protococcus nivalis, Ag. Supp. p. 138. Hook. Eng. Fl. v. 
p. 895. Mackay Hibern. p. 246. Hass. Alg. p. 335, t. 83, f. 2. 
Harv. Man. p. 182. Grev. Sc. Crypt. FL. t. 281. 
Palmella nivalis, Hook, in Parry’s Voy. App. p. 328. 
Tremella nivalis, Brown, in Ross Voy. Supp. p. 44. 
Uredo nivalis, Bauer. Journ. Sci. and Art vii. p, 222, t. 6. 
On snow and wet rocks, &c. 
Probably not specifically distinct from Chlamydococcus pluvialis. For 
the history of this minute plant, long known as “ Red Snow,” consult 
“ Greville’s Scottish Cryptogamic Flora,” Vol. iv. plate 231. The inter- 
esting observations by Agardh and others, there detailed, are too long 
for quotation here. 
Introduced to the notice of botanists in this country on the return of 
Capt. Ross from Baffin’s Bay, where it was found extending for some 
miles, it was regarded by Bauer as a fungus, by Robert Brown as an 
Alga, and by Baron Wrangel as a Lichen. Agardh first included it in 
Algez, under the name uf Protococcus nivalis. 
It has been found in this country “on the borders of the lakes of 
Lismore, spreading abundantly over the decayed reeds, leaves, &c., at 
the water’s edge, but in greater perfection on the calcareous rocks within 
the reach of occasional inundation, more or less perfect at all seasons of 
the year.”—Carm. Also in Ireland. 
Plate XXTI. fig. 2. a, still cells X 400 ; }, cell divided in two; v, cell 
divided in four; d, advanced stage of subdivision in four; e, encysted 
zoospore ; f, free zoospore ; g, resting cell. 
