141 
fresh water. Divisions 2-3} diameters, granular, and often tumid. 
When dried, dull greenish or ochreous. Diam. .00025”—.00038”. 
C. glactalioides, n. sp. Near Ktz’s C. glacialis, Light green. 
Length of divisions, 2-5 diameters ; not contracted at the joints. 
Divisions not swollen. Dries light pea-green. Diameter .00024"— 
.00032°. In gelatinous masses on dripping rocks. 
41. Psichohormium, Ktz.—P. major, Ktz. Stagnant pools and 
quiet waters. 
42. Cladophora, Ktz.—C. fracta, Dillw., frequent in pools.—C, 
viadrina, Ktz. Not uncommon on moist earth.—C. canalicularis, 
Roth. Niagara, Three Sister Islands. 
43. Chloropteres, Mont.—Ch. Leprieurii, Mont. Found sparsely 
intermingled with a Conferva collected by Mr. Brandegee, Col. 
Observation of more ample specimens may change the specific name. 
44. Rhizoclonium, Ktz.—Rh. hieroglyphicum, Ktz., Var. Ameri- 
canum, new var. Thesize is larger, and the divisions are shorter than 
those of the European forms. Shaded garden ground and green- 
houses. Represented in Rabenhorst’s Algen Europa’s, Dec., 240, 
No. 2496. 
45. Oedogonium, Link.—O. subsetaceum, Ktz.—O. compressum, 
Hassel. Differs fromthe typical form in basal cells ; these are disci- 
form, and not trilobate. Oh Spatter-Dock in pools.—O. capilla- 
ceum, Ktz.—O. fonticola, A. Braun. Ponds of spring water. 
46. Ulothrix, Ktz.—U. varia, Ktz. Exposed clay soil.—U. 
tenuis, Ktz. On stones in rapid waters.—U. subtilis, Ktz. Not 
unfrequent in troughs of running water.—U. nitens, Menegh, 
forms a dark green coating on moist shaded stones and brick pave- 
ments.—U. flaccida, Ktz., frequent in green-houses, etc. 
47. Chroolepus, Ag.—C. lageniferum, Hild.—C. umbrinum, Ktz. 
This is the same plant, figured by Wood as Pleurococcus seriatus. 
Bark of trees. 
48. Bulbotrichia, Ktz.—B. Onokeensis, n. sp., found in small 
bright pea-green cushion forms, } in. to 1 inch in diameter, on partly 
shaded rocks in Onoko Glen. Represented in Rabenhorst’s Algen- 
Europa’s. Decade 243, No. 2428. 
49. Schizogonium.—Sch. Boryanum, Ktz. Rocks, Colorado. 
Collected by Mr. Brandegee. oe : : 
Sch. Ravenelit,n. sp. Forms a thin olive green coating on bark 
of trees. Filaments flexuously iuterwoven, sometimes free, but 
more usually laterally united, commonly two, but frequently 3 or 4. 
Articles equal to half the diameter. Cytioderm thin, colorless. Diam. 
of fils., .00064”-.0007”. Collected by Prof. Ravenel, Aiken, S. C., 
from the bark of Melia Azederach, or China-Tree. 
so. Chaetophora, Shrank.—Ch. radians, Ktz. Hab. on plants 
in pools. 
51. Stigeoclonium, Ktz.—S. tenue, Ag.—S. thermale, A. Braun. 
Dr. Wood ventures no species. The former is probably the plant he 
observed. we : 
52. Aphanochaeta, Brown. I find three varieties. Besides the 
name adopted by Dr. Wood, I add “ A. confervicola,” Naeg. Found 
parasitic upon other Algae. 
