138 THE JOURNAL OF BOTANY 
the cortex, while others remain in the host and conten to force 
their way between the cells. bee hey the filaments do not actually 
enter the host-cells, they bec in some way connected with them, 
since they extract the vient Aeaiaisied in the medulla of Phy/lo- 
ng filament is unable t } 
means of the antheridial ostiole. Dr. Darbishire says that the exit 
of the parasitic filament seems to affect the surrounding tissue, 
giving an appearance of corrosion. 
Since the tetraspores ripen in December and ea and are 
discharged soon after, the pertinent question is asked, what becomes 
of these spores till the oe comes for fresh attacks on the host plant 
in the following autumn ? e author suggests that this is an 
asexual form, which sve rise to a sexual plant on een host, 
and that the germinating spore of Actinococcus, as w w it, may 
be the carpospore. This sounds a more probabl suggestion than 
that of Prof. Reinke here given, that Actinococcus is the asexual 
generation of Phyllophora Brodiai, growing parasitically on it. 
Dr. es : 
appears to have been thrown on the points at issue. The author 
is about to examine other species of this genus, and his results are 
promised later. The paper ends with a diagnosis of the genus 
Actinococcus and the species A. subcutaneus (= A. roseus Kutz. y 
“Notes on Thorea,”’ by G. C. Hedgecock and A. A. Hunter, in 
Botanical 7 ae (Dec.), p. 425, records the occurrence of Thorea 
ramosissina Bory in Nebraska, It had been previously found in 
exas, 
e ors deseibe oe i, and figure a section with hairs 
and fruit. he branching appears to be more sparing, the colour 
is olive-brown rather than ere and the hairs show points of 
difference from other records; but in the main the Nebraska plants 
agree with the Sabiticd cab of the species. 
The Bulletin of vie bot rrey a Club Bas gives short 
notes on ‘‘ Four Siphoneous Alg the Pacific Coast,’ by Prof. 
De Alton Saunders. Codium open var. californicum J. A 
hi, 
filaments of each species are figured mde: by side. Prof. Saunders 
evidently does not Seg in the presence of a mucronate tip in 
some of the cells of C. canatsenn, although it has been crag 
that. the two reset of cell grow on the same plant, There are 
cells in these two 0 species, and the question as to the specific v 
of the mucronate point should be iat —— ed. Codium a ewe 
Ag. is recorded from Monterey. Valonia ovalis Ag.—or, as it should 
be ¢ , Halicystis ovalis Schmitz—is aking astcmled for the first 
