102 
ALGJ5. 
borough’s records, we think, on insufficient evidence. He remarks : 
Mr. A. Hamborough names several other species (of Polysiphonia ) 
from the Isle of Wight, some I think scarcely more than varieties 
of the above species ; the following are the rejected species with 
the localities given by Hamborough : — P. fruticulosa, Steephill ; P. 
formosa , St. Lawrence ; P. fibrillosa , St. Lawrence ; P. pulvinata , 
Steephill ; P. Jibrata , Steephill. Certainly P. formosa may be a 
variety of P. urceolata , but the others are surely good species. 
Several other species mentioned by Hamborough are omitted, with- 
out note ; e.g ., Corallina rubens f. corniculata , Steephill ; Lithophyl- 
lum lichenoides , Brook Ledge; Antithamnion plumula, West Cowes; 
PleonosporiumBorreri, Niton; Callithamnion tetragonum f. brachiata , 
St. Lawrence; Nitophyllum uncinatum , West Cowes; Rhodymenia 
palmetta , Sandown; Fucus ceranoides, Medina River; Porphyra 
linearis , Steephill; Castagnea Griffithsiana ; Asperococcus echinatus 
f. vermicularis , Steephill ; Monostroma Grevillii (subnom. Ent. 
cornucopiae ), Niton; Cladophora albida; Lyngbya majuscula , 
Garnet Bay ; Calot-hrix confervicola , West Cowes. We have had 
the opportunity of examining a collection of Marine Algas from the 
Isle of Wight, formed by Count Eugene Poutiatine, and in it were 
the following species not previously recorded from that locality : — 
Ghoreocolax Polysiphonice, Sea View; Myrionema strangulans , 
Shrnklin ; Elachista stellaris f Chordae , Shanklin ; and Giraudia 
sphacelarioidesj Shanklin. 
Algological Notices. By M. Foslie (Det. Kgl. Norske Videns- 
kabers Selskab Skrifter.) 
Under the above title M. Foslie gives some short notes on 
Pelvetia canaliculata , Ralfsia pusilla and Haplospora globosa ? 
Speaking of Ralfsia clavata , he says: “ I agree with Batters, Mar. 
Alg. Berwick-on-Tweed, p. 67, in regarding Stragularia only as a 
subgenus of Ralfsia , but not referring R. Clavata (and R. 
Spongiocarpa ? ) to the former, as the filaments not seldom are 
curved, and the sori, so far as known, never confluent. Cp. Rke. l.c.” 
With regard to this we would call M. Foslie’s attention to the 
fact that the genus Stragularia was specially formed by Stromfelt 
(om Algvegetationen vid Islands Kuster p. 49) for the reception of 
this very specie i Ralfsia clavata. In R. clavata, too, the fructifica- 
tion is rather uniformly diffused over the frond, the whole central 
portion being often composed of the confluent sori. We may remark 
further that Stragularia pusilla had been removed to the genus 
Ralfsia some months before the appearance of M. Foslie’s paper 
(vide Journal of Botany, June, 1892). 
Propagation of Prasiola (Ber. Deutsch. Bot. Gesell., 1892, 
p.p. 366-374). 
Prof. G. V. Lagerheim’s discovery of a second mode of repro- 
duction presenting strong analogies with the formation of tetraspores 
in the genus Prasiola, coupled with M. Buftham’s equally interest- 
