202 MR. А. D. COTTON ОХ CRYPTOGAMS 
LOPHURA TENUIS, Kitz. = Lophurella Hookeriana, Falk. See p. 186. 
POLYSIPHONIA ATRORUBESCENS, (rer. 
Hooker's specimen, on which this record is founded, is P. anisogona, 
Hook. f. et Harv. 
P. squarrosa, Avitz.= Heterosiphonia Berkeleyi, var. squarrosa, Cotton. 
POLLEXFENIA TENELLA, Kütz. 
The question of Pollexfenia tenella, founded by Kiitzing on a plant said to 
be collected in the Falklands and received from Sir J. D. Hooker, is likely 
to remain for ever obscure, as Madame Weber van Bosse tells me that the 
specimen is not to be found in Kiitzing’s herbarium. The genus is unknown 
in the Antarctic, and the locality is incorrect, hence I have removed the 
name from the Falkland list. 
HALURUS EQUISETIFOLIUS, Aütz. 
Recorded by Agardh; but, as the plant is not known at all from the 
Southern hemisphere, doubtlers an error for Ballia scoparia. 
DUMONTIA FILIFORMIS, (rev. 
The record for this rests on Hooker’s statement in ‘ Flora Antarctica,’ ii. 
р. 487. Ап examination of the specimen at Kew and also at the British 
Museum shows that the plant is not a Dumontia, but an alga possessing a 
cellular structure. The specimens are old, apparently sterile and decayed, 
and must be left as indeterminable. New Zealand and Campbell Island 
material under the same cover is also found to be incorrectly named, so that 
there is now no evidence that Dumontia filiformis occurs at all in the 
Southern hemisphere. 
III. SYSTEMATIC LIST OF FRESH-WATER ALGÆ *. 
MYXOPHYCEÆX. 
CHROOCOCCUS minutus, Nig. Gatt. einz. Alg. р. 46. 
GLŒOTHECE TEPIDARIORUM, Lagerh. Bidr. t. Sv. algfl. р. 44, taf. 1. fig. 12. 
OSCILLATORIA PROLIFICA, Gom. Oscill. ii. р. 205, taf. 6. fig. 8. 
О. SANCTA, Кс. Tab. Рус. p. 30, taf. 42. fig. 7. 
SPIRULINA SUBTILISSIMA, Aütz. Phyc. gener. p. 183 ; Tab. Phyc. i. p. 26, 
taf. 37. fig. 6. 
Nosroc PALUDOSUM, Aiitz. Tab. Phyc. ii. p. 1, fig. 2. 
* Compiled from Carlson’s ‘ Süsswasseralgen ' (1913), аз explained in the Introduction, 
р. 138. 
