1918] | Notes from the Woods Hole Laboratory = 1917. 145 
We seem here to be dealing with a new species. Its main points. 
of difference from previously described species lie in the rhizoidal 
nature of the holdfast; the marked differentiation of erect filaments 
into one primary and several secondary ones; the fact that the 
secondary filaments develop, not from the main thallus, but from the 
rhizoids; and the fact that holdfasts have not been seen without erect 
fronds. The reason for this latter fact appears to lie in the nature of 
the development from the spore. The spore, upon germination, 
gives rise to an upright filament which later becomes the primary 
thallus. When this is only a few cells in length, the lowest cell appears. - 
to swell and puts forth two or three filaments downward into the host. 
tissue. The holdfast develops later therefore than the primary 
thallus. Any secondary filaments that may appear arise as buds from 
these rhizoid-like structures. 
No sexual reproduction has been observed in this plant, but spores. 
are produced in the manner characteristic of the genus.— RALPH E. 
CLELAND, University of Pennsylvania. ; 
EXPLANATION OF PLATE 124. 
Fig. 1. Bulbochaete Furberae; erect oogonium. X 485. 
Fig. 2. x x patent oogonium. X 485. 
Fig. 3. p . immature oogonium with two dwarf males. 
“ xX 485. 
Fig. 4. s 4 oogonium slightly more developed, with five- 
dwarf males. X 485. 
Fig. 5. : . androsporangium. X 485. 
Fig. 6. Erythrotrichia rhizoidea; holdfast. X 455. 
Fig. 7. s B secondary thallus arising at base of primary 
thallus. X 485: 
Fig. 8. s 3 formation of spore. X 455. 
Fig. 9. 2 - escaping spore. X 455. 
Figs. 1-5 are by I. F. Lewis; 6-9 by R. E. Cleland. T E 
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