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POLYSIPHONIA 143 
differs from the Polysiphonia paniculata, described by Montagne 
three years later from Peruvian material collected by Gaudichaud. 
The species occurs also in Chile, where it was collected by 
W. H. Harvey, according to a specimen placed with P. Orbigniana 
in herb. Montagne. 
POLYSIPHONIA sp. 
Repent, forming thin diffuse mats about 1.5 cm. (or more?) 
in diameter; pericentral siphons 4, ecorticate; main filaments 
rather sparingly radicelliferous, 65-105 и in diameter, their seg- 
ments 114-2 times as long as broad; branching alternate, often 
appearing subdistichous and loosely virgate-fasciculate toward 
the apices, the branches usually separated by six segments; ulti- 
mate ramuli erecto-patent or subappressed, fusiform, tapering 
about equally to base and apex, mostly 0.17-0.50 mm. long and 
30-35 и in maximum width, their segments shorter than broad 
Or subequal dis. base, fibrils (*hairs," ''leaves") short and 
inconspicuous. 
On Sargassum, Lobos de Afuera, December 5, 1907, Coker 279 
Р.Р.; also in the same locality, March 18, 1907, Coker 126 Р.р., 
associated with Caulerpa flagelliformis ligulata and Polysiphonia 
paniculata. This small repent 4-siphoned plant is evidently 
allied to Polysiphonia sertularioides (Grat.) J. Ag. and P. subtilis- 
sima Mont., but is apparently not referable to either. It seems 
to differ from both in having the ultimate ramuli obviously nar- 
rowed at the base, from P. subtilissima also in the smaller tufts, 
and from P. sertularioides in the much less conspicuous hairs 
It is possible that the plant represents an undescribed species but 
our material is scanty and sterile, and, with Polysiphonia Gelidii 
Zanard. and certain other oligosiphonous repent species known to 
us from brief description only, we would hardly venture at this 
time to propose for it a new specific name. 
POLYSIPHONIA CURTA Mont. Ann. Sci. Nat. Bot. II. 20: 301. 
1843. Kiitz. Tab. Phyc. 13: pl. 50. f. a, b. 1863. Polysiphonia 
fastigiata Mont. Fl. Boliv. 20. 1839. Not Р. fastigiata Grev. 
Fl. Edin. 308. 1824. 
This was described from Cobija, once in Peru, but now within 
the limits of Chile. Nothing resembling it has me found in the 
collections made by Dr. Coker. The name “Polysiphonia 
