464 SUMMARY OF CURRENT RESEARCHES RELATING TO 



Waiinstobp, K. — Neue europaische und exotische Moose. (New European and 

 exotic mosses.) 



[Detailed descriptions of 17 species.] 



Beih. Botan. Centralbl, xvi. (1904) pp. 237-52. 

 Wheldon, J. A. — Bryum neodamense. 



[One station for this species on the South Lancashire coast lias been destroyed. 

 At another station, near Formby, fruiting specimens were found, a pheno- 

 menon not recorded in Britain for 30 years past. 



Journ. Bot, xliii. 1905 (p. 188). 



Thallophyta. 

 Alg-se. 

 (By Mrs. E. S. Gepp.) 



Marine Algae of Barbadoes.* — A. Vickers has spent two winters in 

 Barbadoes collecting marine algae, and publishes the results. She records 

 215 species, of which 56 were Chlorophyceas and Cyanophyceae, 34 

 Phasophyceas, and 125 Florideae. Among these she describes 16 new 

 species, and includes 14 species already known to science but never 

 hitherto recorded from the Antilles ; thus adding 30 species to the flora 

 of that region. Descriptions are given of the various places on the coast 

 where the best collections were made, and the principal species growing 

 .at each of them are mentioned. Dredging and diving were employed as 

 methods of collection, as well as shore collecting. 



Parasitic Florideae of California.! — W. A. Setchell gives a short 

 and interesting summary of the parasitic Florideae recorded from Cali- 

 fornia since the publication of C. N. Nott's paper in 1897. A species of 

 HarveyeUa, apparently H. mirabilis Schmitz, grows on Gracilaria multi- 

 partita, an Actinococcus, nearly related to A. latior Schmitz, occurs on 

 Gymnoyonyrus linearis J. Ag., and a small parasite, possibly the type of 

 a new genus, has been found by the author on Mychodea episcopalis. 

 Ceramium codicola J. Ag. grows on C odium mucronatumvar. californicum. 

 The author shows also that Erythrocystis Grevillei J. Ag. is nothing 

 more than Ricardia Montaynei var. yigantea Farlow ; and Chrysymenia 

 dolichopoda J. Ag. is C. pseudodichotoma Farlow. Finally a diagnosis is 

 given of Peyssomieliopsis, a new genus of Squamariaceae, differing only 

 from Cruoria in its parasitic habit and consequent possession of 

 rhizoidal filaments penetrating the host plant. The single species 

 P. epiphytica Setchell and Lawson is parasitic on fronds of Colly - 

 menia sp. and was distributed as No. 1049 of the Phycotheca Boreali- 

 Americana. 



Leptosarca.J — A. and E. S. Gepp give further details as to the 

 structure of this new Antarctic alga, which was too diagrammatically 

 figured in tab. 470 of " Journal of Botany." They specify the points in 

 which the figures are at fault, and recapitulate the most striking features 

 of the plant, viz. the extremely thin walls of the large interior cells and 

 the monostromatic arrangement of the cortical layer ; and they give cell 

 measurements. 



* Ann. Sci. Nat., Ixxxi. (1905) pp. 45-66. 

 t Nuov. Notar., xvi. (1905) pp. 59-63. 

 t Journ. Bot., xliii. (1905) p. 162. 



