RECENT LITERATURE ON FRESHWATER ALG^. 195 



Bradford. A.L.S., 1894. B.A., B.Sc, Lond. Assistant- 

 Lecturer in Bot., Owens Coll., Manchester, 1885. 'Proto- 

 plasmic continuity in Algae,' Journ. Bot. 1884-85. Collection 

 of fossil pi. in Manchester Museum. E.S.C. x. 223; Journ 

 Bot. 1896, 488; 1897, 193, with portr. 

 Higgins, Rev. Henry Hugh (1814-93) : b. Turvey Abbey, Beds, 

 28 Jan. 1814 ; d. Liverpool, 2 July, 1893. B.A., Camb., 1836, 

 M.A., 1839, Geologist. Chaplain, Kainhill Asylum, Liverpool, 

 1853-86. * Fossil Ferns in Ravenhead Colliery' (with F. P. 

 Marrat), 1872. R.S.C. iii. 348; vii. 978 ; x. 226; Jacks. 182- 

 Journ. Bot. 1893, 286; Geol. Mag. 1893, 381. 



(To be cnntinned.) 



NOTICES OF BOOKS, 

 Recent Literature on Freshwater ALG-iE. 



The January part of Flora for this year contains the eighth of 

 a series of papers pubHshed at intervals by Prof. Goebel, entitled 

 " Morphologische und biologische Bemerkungen." This paper, 

 which has for its subject " Fine Siisswasserfloridee aus Ost- 

 Afrika," is a sequel to the sixth of the series, " Ueber einige Siiss- 

 wasserflorideen aus Britisch-Guyana " (Flora, Heft iii. Scbluss, 

 Juni, 1897). In the earlier paper Prof. Goebel deals with previous 

 literature on the subject, and raises biological questions on this 

 group of algae— a group which is specially interesting from a 

 geographical point of view. 



The genera of FloridecB hitherto known to be represented both 

 in marine and fresh waters are Bostrt/chia, Lomentaria, Chantransia, 

 Delesserla?, and Caloglossa, besides two very doubtful species of 

 Ballia. A freshwater alga is described by Askenasy and Schmidle 

 from a mountain stream in New Guinea under the name of Dasya 

 Lauterbachi [Flora, Heft ii. Feb. 1897), but this plant, according to 

 Prof. Goebel {Flora, Heft iii. 1897, I. c), belongs to Bostrychia, and 

 is nearly allied to B. Moritziana. The genus Dasya can therefore 

 no longer be regarded as having a representative in fresh water. 

 The only freshwater species of Delesseria hitherto recognized is 

 D. amboinensis Karsten (Bot. Zeit. 1891, p. 265), of which the fruit 

 has not yet been seen. The whole structure of the thallus points, 

 however, to its inclusion in Caloglossa rather than in Delesseria. 



Prof. Goebel now describes a second species of Delesseria from a 

 plant found by him among undetermined mosses in the Hamburg 

 Museum. The "moss" in question was collected by Stuhlmann 

 in Kibaoni stream, north from Kokotoni, Zanzibar, and examina- 

 tion proved it to be no moss, but a freshwater species of Floridem. 

 Prof. Goebel draws a comparison between this alga and Delesseria 

 amboinensis Karst., to which it bears a close resemblance, but shows 

 that sufficient points of difference exist to distinguish them as 

 separate species. He therefore calls the African form ("for 



p 2 



