ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 83 



Marine Algse of the Pacific Coast of North America. Part I. : 

 Myxophyceae. — W. A. Setchell and N. L. Gardner {University of 

 California Fuhlications : Botany, 1919, 8, 1-138, 8 pL). Thia is the 

 first part of a complete account of the seaweeds of the Pacific Coast ; 

 and the three remaining parts are stated to be in advanced preparation. 

 The present one contains thirty genera of Blue-green Algse, under 

 which are placed ninety-sii species and some varieties and forms. 

 Descriptions of the orders, families, genera and species are given, and 

 are amplified with critical notes. The addition of keys facilitates the 

 naming of specimens. A marine flora of this region has long been 

 needed. A. G-. 



Preliminary Catalogue of the Pelagic Flora of the Bay of 

 Quarto dei Mille, near Genoa. — A. Forti {Nuova Notarisia, 1920, 31, 

 65-72). Merely a preliminary list of 235 species collected in the Bay 

 -during the whole year of 1915 by Eaffuele Issel, to be followed by full 

 details and descriptions later ; a study carried out at the Marine 

 Laboratory of Quarto dei Mille. The recorded species include 1 Cysto- 

 flagellate {Noctiluca miliaris Sur.), 123 Peridiniales, 101 Bacillariales, 

 •3 Silicoflagellata, GoccoUthophora leptopora Lehm., and 6 Chlorophyceae. 



E. S. G. 



Parasitic Floridae : I. — W. A. Setchell {Univ. California PuU. 

 Bot, 1914, 6, 1-34, 6 pis.). A monograph of the genus Janczewskia. 

 After a short introduction the author gives a history of the genus, 

 followed by a short account of his materials and the host plants. The 

 morphology of J. verrucdeformis and /. tasmanica is then discussed as 

 representing the extremes of structure thus far discovered in the genus. 

 All three sorts of reproductive bodies usually found among Floridege 

 are known in this genus. Under taxonomy a critical description is 

 given of each of the six species, of which four are new. The host- 

 plant of one of them, J. Solmsii^ is the species commonly known as 

 Laurencia virgata, but has proved to be (either wholly or in part) 

 Ohondriopsis subopposita J. Ag., a true species of Laurencia. Janczewskia 

 is divided into two groups which differ in certain morphological details. 

 The genus is widely distributed in temperate seas from the Mediterranean 

 to the Cape of Good Hope. Since their hosts, Laurenciese and 

 Ghondrieae are also abundant in the warmer temperate and tropical 

 waters, the parasite may reasonably be supposed to have a wider distri- 

 bution than is at present known, since they both belong to the same 

 family. The paper is well illustrated. E. S. G. 



Marine Algae of the Danish West Indies. — F. Borgesen {Dansk 

 Bot. Arkiv., 1919, 3, 305-68). A further continuation of this work. 

 The present part completes Rhodomeleae, including Delesseriaceae and 

 Bonnemaisoniaceae, and begins the treatment of Gigartinales, family 

 Gigartinaceae. Each species is fully discussed and nearly all are figured 

 in habit and structure, as in previous parts of the work. The novelties 

 described are Cottoniella arcuata g. et sp. n., Dasya caraibica, and a var. 

 laxa for Heterosiphonia Wurdemanni Falkenb. E. S. G. 



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