Notes. 
227 
forming little spherical heads much resembling in position the 
antheridia of Griffithsia Bornetiana , Farlow, in which, however, they 
are spread out over the apex forming a hood-like covering, and do 
not, as in Lomentaria , form an enlarged head (Fig. 2). 
While the position is usually directly apical, several tips were 
found where, by the partial branching or merely deflexed onward 
growth, the position had become somewhat lateral. 
Several of the antheridial plants were found, one of which bore 
also numerous tetraspores. In general appearance and manner of 
growth I cannot distinguish the male plant from the common tetra- 
sporic and sterile plants. 
Serial sections through an antheridial tip show the head to be a 
tuft of short (30-35 fx long), radiating, clavate, 2-3 or 4-celled 
filaments originating from the apical cells of the tip and bearing at 
their extremity the antheridial mother-cells (Fig. 3). 
Dr. W. A. Setchell, who examined my material at the time, informs 
me that he shortly after discovered undoubted antheridia of Champia 
parvula (Ag.) Harv., a closely related plant. It was merely a frag- 
mentary specimen and unfortunately was destroyed. Their position 
and appearance, he reports, accord entirely with those of Lomentaria 
uncinata, Menegh. 
H. J. WEBBER, St. Louis, Mo. 
ECTOCARPUS FENESTR ATU S. — Messrs. Holmes and Batters 
include this species in their ‘ Revised List of British Marine Algae 1 .’ 
As far as I know, the single type-specimen exists in the Kew 
Herbarium, to which it came from that of the Rev. M. J. Berkeley. 
The herbarium of Mrs. Griffiths does not appear to contain any 
example. 
With some reluctance, and as a wholly exceptional case, I entrusted 
this unique specimen to Dr. Bornet for examination. It will be inter- 
esting to quote the following extract from a letter which I have 
received from him, dated February 24 : — 
“ Je vous retourne le pr^cieux dchantillon que vous m’avez confix. 
Sa fragility est telle qu’il est fort difficile d’en detacher des filaments ; 
j’ai pourtant r£ussi, sans lui causer aucun dommage perceptible, a en 
prendre une id£e suffisante pour que sa determination soit a peu prbs 
1 Annals of Botany, V, p. 79. 
