130 BOTANICAL GAZETTE [FEBRUARY 
C. fusca (Kuetz.) Bornet and Flah.—Filaments scattered or 
gregarious; living within the colonies of various gelatinous algae; 
in ditches, taro patches, and rice fields. 
C. sandvicensis (Nordst.) Schm.—Epiphytic on filaments of 
Pithophora affinis, in shallow water on the lowlands. 
C. rhizoleniae Lemm.—Epiphytic on Rhizolenia and Hemiaulus; 
collected in plankton between Hawaii and Laysan. 
Rivularia ‘natans (Hedwig) Welwitch.—Colonies spherical, 
hollow, soft, dull olive-green; forming soft brown velvety masses, 
in rice fields and taro patches; common on the lowlands. 
Chlorophyceae 
SPHAERELLACEAE 
Haematococcus pluvialis Flotow.—Occurs throughout the islands 
in shallow pools and streams, often forming reddish patches; it is a 
cosmopolitan species. 
H. thermalis Lemm.—Abundant in the warm springs of the 
Puna district, Hawaii, and endemic to this region. 
VOLVOCACEAE 
Gonium sociale (Duj.) Warm.—Occurs in ponds, taro patches, 
etc., throughout the islands. 
Other well known genera, such as Volvox, Pandorina, and 
Eudorina, have not been reported as yet from the islands. 
TETRASPORACEAE 
Dactylococcus infusionum var. minor Nordst.—A widely known 
species, frequent in streams and shallow waters. 
Dictyosphaerium pulchellum Wood.—A fairly common species. 
PLEUROCOCCACEAE 
Gloeocystis gigas (Kuetz.) Lagerh.—Has been recorded from 
the swamps on the middle slopes of Mauna Kea, Hawaii. 
Raphidium polymorphum Fres.—A cosmopolitan species; occurs 
throughout the islands in fresh waters. 
Schroederia setigera Lemm.—In pools and streams. 
Closteriopsis longissima Lemm.—In pools and streams. 
