Rhodora 
JOURNAL OF 
THE NEW ENGLAND BOTANICAL CLUB 
Vol. 9. October, 1907. No. 106 
SOME NEW GREEN ALGAE. 
F. S. CODLINS. 
(Plate 76.) 
Tue species here noted are only in part from New England localities, 
but so general is the distribution of plants of this class, that the mere 
accident of locality of the original station is of little importance; any 
species of the genera in question is liable to be found in any temperate 
region. 
Pleurococcus marinus n. sp. Cellulis sphaericis, 10—40 » diam. 
cum membrana cellulari; membrana 2 » crassa; colore variante ab 
auriantiaco intenso ad viridem chlorophyllaceam veram; Repro- 
ductione per aplanosporas divisione repitita formatas, 8-64 in cellula; 
membrana cellulari distincta et admodum crassa dum in cellula 
matricali; congerie sporarum substantia gelatinosa inclusa, post solu- 
tionem cellulae matricalis formam sphaericam diu servante. ` 
Cells spherical, 10—40 x diam., including cell wall; wall about 2 y 
thick; color from deep orange to true chlorophyll green. Reproduc- 
tion by aplanospores, formed by repeated division, 8-64 in a cell, 
spore wall distinct and relatively thick while still in the mother cell; 
mass of spores retaining the spherical form and held in a gelatinous 
mass long after the disappearance of the mother cell wall. 
This plant was distributed through a mass of floating algae in shal- 
low pools in a salt marsh at Stover's Point, Harpswell, Maine, July, 
1906. It formed so large a proportion of the mass as to give a brick- 
or orange-red color to the whole, the other species being Lyngbya 
aestuarii (Mert.) Liebm., Cladophora expansa Kütz., and other 
forms usually found in such localities. It has been distributed as 
No. 1316 of the Phycotheca Boreali-Americana. The genus Pal- 
mellococcus was founded by Chodat in 1894, for the single species 
1 Chodat, Materiaux pour servir à l'histoire des Protococcoidées. Bull. Herb. Boissier, 
Vol. II, p. 429, 599. 
