of Australia, where species of the polyarthrodactylae-gloeocarpae 
section most abound, but this species remains quite unique and 
individual. 
No. 14 , Nitella Japonica, additional collections, more mature, 
from Yamagami, Province Ise, distributed as exsiccatae No. 9, 
No. 15, Nitella subglomerata Japonica var. nov. 
Verticils consist of a large number of leaves, often 12 to 16, 
apparently irregularly in a double series, some longer, some 
shorter, but all twice divided ; the first node bears three oogonia 
aud three secondary divisions ; the second node also bears three 
oogonia and three terminals ; rarely one of the secondaiy divi¬ 
sions does not form a node, but remains as a simple, one-celled 
terminal ; the terminals of the second node, usually three in num¬ 
ber, 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 polyglochin group, in all from 3 50 to 400 
long. The oospore is marked with 6 striae, 204 long, 180 by 
190 broad. The membrane of the spore is strongly reticulated, 
the reticulae averaging 5 // in diameter. This Japanese form dif¬ 
fers 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 
distributed 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, two lower of the two cells inflated, the 
terminal cell a sharp mucro, oogonia clustered at the base of the 
fertile verticils 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. 
