25 in diam. at base by 50-68 long. The oogonia are isolated ; 
the oospore 272 long by 245 broad, with seven faint striae, faintly 
granular. 
Collected in Mizoro pond, Kyoto, Japan, in July. 
Nitella multipartita Allen, forma transiliforma. 
Plants about 20 cm. long, erect with about six verticils of bright 
green leaves. Verticils do not overlap ; stem-nodes about 30—40 
mm. distant, leaves about 25 mm. long. Stem sparingly branched, 
as a rule only near the base; stem and branches erect. Leaves 
slightly spreading, somewhat erect, forming a close verticil about 
the stem. Stem 400—500 in diameter. Verticil consists of 7 
leaves. Leaves 3-4-divided ; first node 6-7 divisions, second 3—4 
divisions, third 2—3 divisions, fourth (when present) 2—3 divi¬ 
sions. The first segment, less than half the length of the leaf, 105 
in diameter, the second 75, the third 50, the fourth terminal, 40 
in diameter. The mucro 30 in diameter. The mucro 30 in diam¬ 
eter, by 54 long. The oogonia are isolated on the second node only. 
Antheridia not seen (plants mature and very fertile) ; oospores 
2 75 _ 3°° long by 240 broad with 7—8 blunt ridges : membrane of 
the spore evenly granular (about 3 granules in 5 //). 
This form, it seems, cannot be separated specifically, though it 
is an apparent transition form to N. transilis Allen. Like’the latter 
species the leaves are sometimes only 3-divided, and it more re¬ 
sembles N. transilis in its fresh, bright green color with close, erect 
verticils than extreme forms of the type, with a flexuous pros¬ 
trate habit, of a dull yellowish or brownish green color, with 
spreading verticils ; but the character of the spores, the numerous 
transition forms and its locality connect it with N. multipartita. 
The plants were collected in the same locality as the f. in¬ 
termedia. 
Nitella multipartita Allen, forma intermedia. 
This forms differs from the type in its more erect habit with 
less spreading verticils, fewer nodes on the leaves (4, or very 
rarely, 5); the plants are more slender though more erect, the 
diameters being as follows : First segment 306, second 140, 
third 82, fourth 61, fifth 48 ; the mucro 15 by 48. The oospores 
are of the same size with the same character of ridges and sculp- 
turings on their membranes. 
