70 
minal; the terminals of the second node, usually three in number, 
are one-celled and acuminate above the middle, terminating in a 
sharp point which is solid. . 
The oogonia are aggregated, three together, at each node of 
the leaf, not closely sessile, with a rather large and persistent 
coronula, the lower cells of which appear to be spreading, as in 
some sub-species of the polygiochin group, in all from 350 to 400 
long. The oospore is marked with 6 striae, 204 long, 180 to 190 
broad. The membrane of the spore is strongly reticulated, the 
reticulae averaging 5 “in diameter. This Japanese form differs 
mainly in the somewhat smaller spores, which are much more 
strongly reticulated; the antheridia also are smaller, 200 in diam. 
This species was collected in Mikawa, Seishin pond, and distrib- 
uted as No. 15 of my Japanese exsiccatae. 
No. 16. NITELLA SUBLUCENS sp. nov. 
Nitella diarthrodactyla, homoeophylla, monoica macrodactyla, 
subflabellata, gymnocarpa. Fertile verticils contracted into dense 
terminal or axillary heads, long overtopped by the sterile leaves; 
verticils very dissimilar. The long sterile leaves are surmounted 
by a crown of about four minute two-celled leaflets. Fertile 
leaves twice- rarely thrice-divided, terminal segments usually four, 
short, two-celled, the lower of the two cells inflated, theterminal 
cell a sharp mucro, oogonia clustered at the base of the fertile ver- 
ticils and at the first node of the leaves; oospore, 285 long and 
broad, globular, six or seven striate. The present specimens are 
too immature to determine the character of the membrane of the 
spore. Antheridia about 200 in diameter. | 
This species is closely allied to WV. translucens (Pers.) Ag; from 
which it differs by its smaller size, and especially the much 
smaller oospore (and its locality). 
This species was collected in Sagami, Kodsu, and distributed 
as No. 16 of my Japanese exsiccatae. 
17. Chara gymnopitys A. Br. var. “ alpha” A. Br. 
This form, though not exactly corresponding to gymnopitys 
genuina A, Br., seems to be on the border between that and var. 
(deta) duriuscula A. Br., both from Australia; and as A. Braun 
has left var. “ Alpha” blank, it may well be occupied by this 
variety. The stems are about 306 in diam., with small, conical, 
broad-pointed spines; leaves about 8, stipules 16, the cortex cells 
double, alternately large and small, often with additional, partially 
