288 THE JOURNAL OF BOTANY 
tenuissima. mea ge cellularum vegetativarum divisione in 
omnes directiones. Propagatio fit gonidiis immobilibus minutis 
4-16 intra cellulas bightinds ortis. Diam. cell. 2:2-6°5 
Dominica.—In hot spring, forming a thin green stratum. Tem- 
perature of water 90° F. (32- 2° .), 
is species can be distinguished from P. st ted ap (Kiitz.) C 
by the presence of more than one chloroplast in each cell, and by “a 
total absence of the red oily material which is ea a conspicuous 
feature of that alga. 
e chloroplasts appear to be perfectly homogeneous, and they 
possess regular and sere: margins. The number of gonidia pro- 
duced in each cell is 4, 8, or 16. They are minute, cia: non- 
motile spores, which esc iio guy he rupture of the mother-cell-wall. 
he iscovery of this species necessitates a slight alteration in 
the generic characters of Palmellococeus, so as to include a species 
with more than one chloroplast, and in which red pigment is never 
developed. 
43. Gu oo aiaas (Kiitz.) Lagerh. Barbados oe Hall 
Swamp. Trinidad.—Pools on the Pitch Lake, La 
44, Guaorayium Lorrtespercerranum Hansg. in ‘fe! bericht. 
d. k. Bohm. Gesellsch. 1890, p. 10; Nuova Notarisia, 1890, pp. 264-5 ; 
Stockmeyer in Sitz-bericht. k.k. zool.-botan. Gesellsch. Wien, 1891, 
Bd. xli. (Gleocystis cincta Gutw. in Kom. Fizyogr. Akad. Umiej. 
Krakow. tom: xxx. 1894, p. 78, t. 2, f. 6.) 
Diam. cell. 17-28 p; diam. fam. 4-cell. 61-80 Bi ; crass. fam. 
4-cell. 50 p. (Figs. wate 
Trinidad.—In fou rein Botan. sta daa St. Ann’s 
The only distinction “bet this genus and Glaoc cystis is the 
presence of an opaque zone of ecelinr singe, which i is closely bound 
round the transparent Palwiiiiotis envelope. In the 4-celled colony, 
this zone, which is quite black in appearance, is somewhat cruciform 
in the front view of the colony, but in the side view it is oblong- 
sie el with a central space. In the 2-celled colony the black 
zone is in the form of @ ring extending round the median part of 
the gelatinous envelope. The rest of the mucous covering often 
becomes i nig nated with this same black pants 
et. 
p. 157, t. 21, f. 12) scarcely represent the plant. Se hmidle has 
also found and figured . fo Saly pty t from Reveilig (vide Flora, 1896, 
Bd. 82, Heft 8, p. 802, 
e idea once put ti that this plant stood near to some of 
the Desmidiacee is quite erroneous. Its nearest ally is Gleocystis. 
HETEROKONTA. 
5. Characiopsis ellipsoidea, sp. n. (Fig. 8). Cellule vege- 
atin anguste ellipsoider, apicibus obtuse rotundatis, stipite brevis- 
simo crasso sine disco basali predito; chromatophoris 4, parietalibus, 
