NELLIE CARTER: FRESHWATER ALGE. 47 
FRESHWATER ALGÆ. 
By NELLIE CARTER, D.Se. 
(PLaTE 4.) 
Introduction. 
THE following is a list of freshwater algæ observed in collections made by 
Mr. R. H. Compton in New Caledonia in 1914. The algal flora of this 
island has not previously been investigated, although a certain amount of 
work has been done on some of the neighbouring islands. A consideration 
of the following works is important in dealing with the algal flora of New 
Caledonia :— 
Borer, O.—Australische Süsswasser Chlorophyceen.  Bihang till K. Sv. Vet.-Akad. 
Handl. xxii. No. 9, 1896. 
BonaE, O.—Über tropische und subtropische Süsswasser Chlorophyceen. Ibid. xxiv. 
No. 12, 1899. 
GuTwiNskr R.—De Algis a M. Raciborski anno 1899 in Insula Java collectis, Bull. 
Akad. des Sciences Cracovie, 1902. 
MaskELL, W. M.— Contributions towards a list of New Zealand Desmidieæ. Trans. 
N. Zeal. Inst. xiii. 1881. 
MASKELL, W. M.—On the New Zealand Desmidieæ, Additions to Catalogue and Notes 
on Various Species. Ibid. xv. 1888. 
MASKELL, W. M.— Further Notes on the Desmidieæ of New Zealand. Ibid. xxi. 1889. 
Mónrvs, M.—Australische Süsswasseralgen. Flora, 1892. 
NoRDSTEDT, O.—De' Algis aque dulcis et de Characeis ex insulis Sandvicensibus a Sv. 
Berggren 1875 raportatis. Lund, 1878. 
Norpstept, O.—Freshwater Algæ collected by Dr. S. Berggren in New Zealand and 
Australia. Kongl. Sv. Vet.-Akad. Handl. xxii. 1888. 
SCHMIDLE, W.— Einige Algen aus Sumatra. Hedwigia, xxxiv. 1895. 
SCHMIDLE, W.—Siisswasseralgen in “Die Flora der Samoa-Inseln." ^ Engler's Botan. 
Jahrbuch, xx iii. 1806. 
The collections proved to be very rich in diatoms, and the Cyanophyceæ 
also were very interesting, yielding one new genus, and two other species 
new to science. The filamentous Chlorophyceæ were fairly abundant, but 
unfortunately they were mostly in a sterile condition, and so could not be 
specifically determined. Desmids were not numerous, the genera Closterium 
and Cosmarium being best represented. On the whole the collections were 
made either from running streams or from subaérial habitats. This explains 
the relative abundance of diatoms and filamentous Chlorophyceæ on the one 
hand, and of Cyanophyceæ and other subaérial algæ on the other, and the 
comparative scarcity of such algse as Desmids which require still water and 
permanent boggy conditions. 
A number of ubiquitous species were present in the collections, but some 
of the species observed have hitherto only been recorded from one or other 
