126 BOTANICAL GAZETTE [FEBRUARY 
Inactis hawaitensis (Lemm.) DeToni.—Filaments solitary, grow- 
ing in a gelatinous mass formed by other algae; collected in warm 
pools on the Island of Hawaii, in company with Gloeocapsa, 
Stigonema, etc. 
Microcoleus paludosus (Kuetz.) Gomont.—Filaments entangled, 
growing among other algae or forming a blackish or blue-green 
stratum; together with other algae it forms a layer covering rocks 
on the bottoms and sides of the ‘‘Green Lake’’ in Puna, Hawaii. 
Catagnymene pelagica Lemm.—Unicellular, free floating fila- 
ments; collected in plankton between Hawaii and Laysan. 
C. spiralis Lemm.—Habitat as for the pEeceee species ; 
collected in plankton between Hawaii and Laysan. 
Haliarachne lenticularis Lemm.—Filaments multicellular, free 
floating in globose or elongate colonies; collected in plankton 
between Hawaii and Laysan. 
NOSTOCACEAE 
Nostoc punctiforme (Kuetz.) Hariot.—Colonies small, globose, 
scattered or confluent; frequent on the wet walls of ditches and 
taro patches. 
N. paludosum Kuetz.—Colonies very minute, scarcely visible, 
punctiform, gelatinous; in shallow ditches and pools. 
N. Linckia (Roth) Bornet.—Colonies of various sizes, finally 
clathrate-fenestrate and irregularly torn, blue-green or violet; 
occurs with Conferva sandwicensis and other algae in shallow pools, 
taro loi, swampy places, etc., at low altitudes. 
N. piscinale Kuetz.—Fairly abundant in late summer in rice 
fields, taro patches, irrigation ditches (au-wai), etc. 
. Spongiaeforme Agardh.—Colonies at first minute, finally 
expanded, verrucose, bullose; in taro patches and other warm, 
shallow, muddy bottomed waters; fairly plentiful. 
N. foliaceum Mougeot.—Colonies gelatinous, spongy, lacunose; 
in globules among mosses and liverworts on wet cliffs in the mon- 
tane rain forest zone, and in the vicinity of waterfalls; not recorded 
from the lowlands. 
N. commune Vaucher.—Colonies ace out as undulating, 
folded, fleshy, torn or perforated sheets, leathery on the surface; 
