69 
13. NITELLA PULCHELLA sp. nov. 
Nitella polyarthrodactyla, monoica, gloeocarpa. 
Stems about 460 in diamater. Verticels consist of eight 
or nine leaves (with an occasional simple, undivided leaf, but 
not heterophyllous.) Leaves about 150 in diam., thrice di- 
vided, primary segment much longer, (2680) ; first node bears 
6-7 secondary segments, 68 diam., 600 long; second node 
bears 5 tertiary segments, 34 in diam., 175 to 200 long; oc- 
casionally one of these divisions is undivided like a simple ter- 
minal with three cells; the third node bears four to six (usually 
four) two-celled terminals, 25. diam., 170 to 240 long. The ter- 
minals are two (rarely 3) celled, the cells about equal in length; 
the terminal cell is not mucroniform, but terminates, rather ab- 
ruptly, in a sharp point (some collections more elongated and 
slender) ; other specimens, terminals very short, forma brachyteles. 
The fertile verticils are somewhat compact and borne upon pedi- 
cels arising from the stem within the primary verticils ; the entire 
fertile verticil becomes a globular, gelatinous mass. The leaves 
of the fertile verticil are usually scvice divided, the antheridia 
borne on the second node are about 225 in diam., and decidedly 
stipitate, the stipes 200 long and 54 indiam. The oogonia are 
borne on both nodes of the leaf, single; usually on the terminal 
node, sessile, the coronula minute. 
- The oospore, dark reddish, is 250 long, 200 broad, with 7-8 
prominent ridges, the surface is strongly reticulated, the reticulae 
5-12 in diam. : 
The relationship of this beautiful species is not clear, in some 
features it may be related to NV. ¢érichotoma A. Br., but it is clearly 
separated from it as well as from the subspecies Zeyhert and 
Lechleri. 2s 
It may be considered remotely similar to WV. gelatinosa A. Br., 
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. 
Verticels consist of a large number of leaves, often 12 to 16, 
apparently irregularly in a double series, some eo some 
shorter, but all twice divided ; the first node bears t ei sea i 
and three secondary divisions, the second node also he t oe 
oogonia and three terminals; rarely one of the secon ay ivi 
sions does not form a node, but remains as a simple one-celled ter- 
