88 
ALGOLOGICAL NOTES. 
Pressure of these large bodies on the adjacent assimilation cells 
would affect the direction of the cells of the tender parenchyma 
below, and this, when once started, would tend to be intensified, 
particularly as the sporangia first appear at the free end of the 
plant, which is also the older. 
I requested Mr. J. T. Neeve, of Deal, to send me any twisted 
specimens of Chorda Filurn he might see. The only one, how- 
ever, which he has been able to send was a waif, very battered and 
worn, and considerably decomposed, picked up in November. The 
spiral character was not very marked. I found, however, here and 
there small groups of the plurilocular sporangia amongst abund- 
ance of unilocular. 
G-iffordia Padinae: a new marine alga. 
Algologists are greatly indebted to the distinguished Dr. Ed. 
Bornet for his Note sur quelques Ectocarpus (Bull, de la Soc. Bot. 
de France, 1891), in which he shows that the reproductive organs 
of plants still included in this large genus offer remarkable dif- 
ferences. Of two species ( E . secundus Kiitz., and E . Lebellii Crn.) 
which possess antheridia of an orange tint, containing antherozoids, 
and zoogametangia of a similar form, Mr. Batters has formed a 
new genus — Giffordia. Since they were described by Dr. Bornet in 
Etudes Phycologiques (p. 24), in 1878, antheridia have been 
observed on no other species of Ectocarpi . 
In September, 1891, at Sidmouth, I found a minute Ectocarpoid 
plant growing on the lower part of Padina Pavonia Gaill. The 
orange tint of some bodies upon it arrested attention. Sections 
of the host were found too destructive of the epiphyte, which is 
best studied by teasing out pieces of the Padina. It is attached 
to its host by a very short root-like filament which is inserted 
between two cells of the Padina. In the earliest form it con- 
sists of an erect simple filament of but a few cells in length. Quite 
close to the base, on a bent pedicel of two or three short cells, an 
antheridium is placed. This is ovate-lanceolate in outline, some- 
times mucronate, up to 105 p long by 52 p in greatest width, filled 
with pale orange bodies arranged in regular tiers, and occupying 
about 4/xin height (Fig. 6). Sometimes there are two antheridia 
at the base, or there may be an antheridium and a plurilocular 
sporangium. The latter bodies are similar in form to the 
antheridia, but generally longer, and may reach a length of 130 p, 
and a breadth of 55 p. 
A sporangium is usually so much like that of Acinetospora 
pusilla Born. ( Ectocarpus pusillus Griff.) that I was strongly 
inclined to regard my small plant as a sexual condition of A. 
pusilla. Dr. Bornet, however, to whom I owe my sincere thanks 
for the careful examination he made of specimens sent him, pointed 
out that when the smaller specimens bearing antheridia had also a 
mature sporangium the bodies contained in this were considerably 
