78 SUMMARY OF CURRENT RESEARCHES RELATING TO 



see also Bot. Oe/ifralbl., 1918, 137, 21)4). The studies consist of a series of 

 4U'ticles dealing with various algological questions. The genus Leathesiu, 

 including Cori/nophla'a, is worked out afresh and the structural develo})- 

 luent described, as is also that of Myriactis and Elachista. The distin- 

 guishing generic characteristics are given of Enteromorpha, Gladophora, 

 Contarinia, Cruoridla, Fei/ssonellia, and PltyUophora. Rhodochorton 

 membrcmaceum Hauck, and Chantransia yninutissima Hauck, are united 

 under the name Rhodochorton ffaiicJcii. The systematic position of 

 Chondria tenuissima and AJsidlum Helminthochortos is made clear, and the 

 antheridia of the latter are described. Five new species and three new 

 forms of existing species are described. Pringsheimia scidata is recorded 

 for the first time from the Mediterranean region. A special section, 

 " Contributions to a Knowledge of tlie Marine Summer Vegetation of 

 Trieste and Eovigno," contains the ecological observations. E. 8. G. 



Physicological Contributions. — W. A. Setchell and X. L. Gardner 

 {Univ. California Puhlir. Bot., 1920, 7, 279-324, pis. 21-31). The 

 authors describe and discuss critically one new genus and seventeen new 

 species, and form seven new combinations to denote previous species or 

 varieties, all belonging to Chlorophycea;. The new geimsPnter/ioretia is 

 proposed for a new endophyte found growing within the membranes of 

 Porphyra naiadt/m. Its reproduction not having been determined, it 

 is among the numerons form-genera of uncertain position and is placed 

 provisionally among the Chastophoraceas. It resembles Pseudodicfyon 

 Gardner, from which it differs in forming solid filaments several cells in 

 thickness. Gomontia Bornetii nov. nom. represents plants hitherto 

 included under G. polyrhiza B. & F., which have the shorter and broader 

 type of sporangium, and blunt, simple or slightly branched rhizoids. 

 All the species here described are the novelties included in the author's 

 " Marine Algte of the Pacific Coast of North America : Part 11. , 

 Chlorophyceffi." E. S. G. 



Marine Algae of the Pacific Coast of North America : Part XL, 

 ChlorophycesB. — W. A. Setchell and N, L. Gardner {Univ. Calif ornki 

 Publ. Bot., 1920, 8, 139-374, pis. 9-33). The second part of this work 

 is here presented, the first having been devoted to the Myxophycea?. 

 Pending the publication of the other two parts, no explanation nor 

 introduction is issued. Keys are given to orders, families, genera and 

 species, followed in each case by a diagnosis, references to literature, and 

 valuable critical notes on history, structure, systematic position, geo- 

 graphical problems, etc. Thirty-four genera are represented. The 

 no\ cities were published previously in a separate paper. E. S. G. 



Fungi. 



Research on the Sexuality of Phycomyces nitens. — Grete Orban 

 {Bedi. Bot. Gentralbl., 36, Abt. 1, 50 pp., 2 pis., 20 figs. ; see also 

 Hedwi-na, 1920, 62, Beiblatt, 21-22). The writer follows on the steps 

 of Blakeslee's work on Mucorini. She finds + and - mycelium in 

 Phycomyces, and is able to distinguish them by differences in growth, 

 etc. The processes of growth and copulation between the gametes is 



