fe 
catum, DC.—Oed. Pringsheimii, Cramer.—Oed. depressum, Pringsh. 
—Oed. echinospermum, A. Br.—Oed. rivulare, L. le Clerc. Florida. 
(J. D. S.)—Oed. affine, Rabenh. —Oed. capillare, Ktz. Submarine 
waters, Cal. (C. L. Anderson.)—Oed. grande, Ktz.—Oed. Mon- 
tagnei, F. Mazz.—Oed. hexagonum, Ktz.—Oed. scutatum, Ktz.— 
Oed. ochroleucum, Ktz. Cal. (C..L. And.)—Oed. fasciatum, Ktz.— 
Oed. tenellum, Ktz.—Oed. delicatulum, Ktz. 
Oed. apiculatum, n. sp. Oed. cellula basili bi-tri-lobata, articulo 
terminali apiculato; articulis diametro plerumque, .0006’—.0008”, 
24-—3-plo longioribus, subcylindricis, vel sursum paulum dilatatis, 
inaequi-crassis, proximis supra oogonium saepe multo minoribus, 
deinde gradatim dilatatis, saepe .0005” ad .oo15” ; oogoniis ovali- 
bus modo singulis, modo 2-5 continuis, plerumque superiore polo 
paullum productis; oosporis ovalibus, diam. .0015”, long. .002”’- 
.0025”; antheridiis bi-cellularibus. Pools, and slowly flowing waters. 
Oed. setigerum, n. sp. _Oed. cellula basali disciformi dilatata, 
articulo terminali attenuato et plerumque in setam hyalinam longe 
producto ; articulis diametro .0008”—.0012”, 3-6-plo longioribus, 
sursum incrassatis, subclavatis ; oogoniis singulis aut pluribus, sin- 
gulis obovatis, sed si continuis truncato-ellipticis ; oosporis in 
forma oogonii arcte involutis; antheridiis quaternis cellulis. 
Pools, fringing old culms, etc. 
55. Bulbochaete, Ag.—B. setigera, Ag —B. intermedia, de By. 
—B. gigantea, Pringsh.—B. crenulata, Pringsh.—B. minor, A. Br.— 
B. gracilis, Pringsh. Everywhere in stagnant waters; beside those of 
this vicinity I received specimens from Cal., Colo., S. Car. and Florida. 
56. Hormiscia, Aresch.—H. zonata, Aresch. Cold spring, Slate 
region.—H. moniliformis, Ktz. Sphagnum swamps, N.J. (C. F. A.) 
—H., sg her Ktz. Calcareous spring. 
57. Ulothrix, Ktz.—U. thermarum, Wartm. Trenches of war 
waste water.—U. variabilis. Mountain streamlets.—U. stagnorum, 
Rabenh. Meadow pools.—U. subtilissima, Rabenh. Mountain 
springs.—U. oscillarima, Ktz. Calcareous springs. 
58. Chroolepus, Ag.—Ch. odoratum, Ag. Shade trees—Ch. 
moniliforme, Naeg. Stones, mountains of New York and New Jer- 
sey. (C. F. A.)}—Ch. iolithus, Ag. Mt. Washington, N. H. (C. 
F, A.)—CA’. corticulum. 1 associate this name with a variety of Ch. 
aureum, particularly common on the trunks of trees in the Southern 
States, forming a loose, green stratum. 
59. Poterophora, novum genus. Aérea; fila articulata, varie 
ramulosa ; genicula et cellulae terminalia saepe#rcellulis fructiferis 
urceolatis conststerrtta. bn dtrnc4la, 
P. Donnellit,n. sp. P. aérea, strato viridi, molli, intricato vel 
pulvinulo; filis distincte articulatis, varie ramosis, articulis .oo15”— 
.0o2” diametro, plerumque duplo triplove longioribus, nonnumquam 
aequalibus, dilatatis, subsphaericis; ramulis enormibus, modo 
lateralibus, modo apicalibus, saepe tenuioribus; geniculis et cellulis 
terminalibus saepe formis urceolatis coastructis ; novas gemmas 
gignentibus, primo sphaericas, deinde elongatas, divisas, nova fila- 
menta procreantes. 
Bark of trees, Florida. (J. Donnell Smith.) 
