CHROOCOCCACEA, 219 
We are of opinion that this and the next species, as well as the 
Palmetla Mooreana figured on the 5th plate of this wore, are all one 
species. 
x Plate LXXXVILI. fig. 3. a, natural size; 0d, cells magnified 400 
iam, 
Aphanothece stagnina. (Spr.) Rabh. d/g. Eur. IL, 66. 
Thallus gelatinous, oblong or elliptical, or nearly globose, 
from the size of a pea to that of a cherry, pale hyaline verdi- 
gris green; cells vblong-oval, always smaller than in A. prasina, 
4-1 times longer than broad, tegument none, cell-contents pallid 
verdigris green. 
Sizg. Cells -003-:005 x *005-'008 mm. 
Kirch. Alg. Schles. 252. 
Coccochloris stagnina. Spreng. Linn. Syst. iv., p. 872. 
In stagnant water. 
It is very doubtful whether any definite specific character can be found 
to separate this from A. prasina. As we have taken both from the 
same pond, the difference in colour, and in the size of the cells, may be 
assumed to be attributable only to difference in age. 
Plate ZXXXVIII. fig. 4. ua, natural size; b, cells magnified 400 
diam, 
GENUS 93. HOMALOCOCCUS. Kutz. (1863.) 
Thallus globose, gelatinous ; internal cells irregularly united 
in a plane, oblong body, immersed in the gelatinous thallus. 
Homalococcus Hassallii. Kutz. Osterprog. 1863, p. 6. 
Thallus globose, soft, green, of the size of a pea or a hazel- 
nut; cells rounded or somewhat angular. 
Sizz. Cells about ‘006-007 mm. diam. 
Rabh. Alg. Eur. ii., 69. 
Coccochloris hyalina, Hass. Alg. 315, t. 78, f. 2, a, b. 
In stagnant water. 
Plate LXXXVIII. fig. 5. «, natural size; 6, cells magnified 400 
diam. After Hassall. 
