ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 581 



tained as distinct, but must be merged in Wilsoniella, its one species 

 becoming W. Hampeana. The genus Wilsoniella he thinks should be 

 removed from the Bryaceas into the Dicranaceaj or Tortulacese. For the 

 rest, he shows that a var. Maclellandii can be separated from the type 

 of Syrrhopodon Gardneri; and re-describes the little-known Indian moss 

 Pogonatum nudiusculnm. 



British and Irish Mosses. — G. B. Savery* gives a list of 144 mosses 

 collected near Pool, in the Wharf e Valley, &c, on the Millstone Grit 

 in a district polluted by smoke. 



T. Barker f states his reasons for believing that Hypnum Sendtneri 

 Schimp. and Trichostornum inclinatum Dixon have been wrongly recorded 

 as occurring in Derbyshire. He also calls attention to Correns's studies 

 of the variability of the bulbils of Webera annotina, which led Correns to 

 distinguish four forms of the plant. All four forms occur near Whaley 

 Bridge ; and Prof. Barker calls upon bryologists to search for them in 

 other parts of the country. 



E. Armitage J supplies a list of mosses gathered in Co. Limerick in 

 July and August 1901. 



H. W. Lett § claims Dicranella curvata Schimp. and Hypnum um- 

 bratum Ehrh., found in Co. Mayo, as new to Ireland. 



Algse. 



Plankton.|| — P. T. Cleve publishes the result of his examination of 

 various collections from the Indian Ocean and Malay Archipelago. 

 Except the Malay specimens all the organisms were collected in winter. 

 Silicoflagellata are represented by 2 species, Chlorophycese by 1, Cyano- 

 phycese by 2, Muracytse and Cysta3 by 6, Peridiniales by 64, and Diato- 

 maceje by 121. Among the " systematic notes " which follow, are de- 

 scriptions of new species of plaukton : — Chsetoceras Aurivillii, C. calvus, 

 Fragilaria Aurivillii, Streptotheca maxima, Thalassiosira Aurivillii ; from 

 the coast collections Fragilaria (?) rhombica, Licmophora Aurivillii, and 

 Sceptroneis Aurivillii. 



The same author % also publishes some notes on Atlantic plankton 

 organisms, based on collections received after his former work had gone 

 to press. Amoug Peridiniales, a new species is described Dinophysis 

 intermedia ; Peridinium spinulosum Murr. et Whitt. is shown to beProto- 

 ceratium reticulatum Schutt, and Protoceratium reliculatum (Clap, and 

 Lach. = P. aceros Bergh) is a distinct and more northern form. 



The report ** on the plankton of the North Sea and Skagerak in 1900 

 by the same author has also appeared. The occurrence of certain forms 

 at certain seasons and the variation in distribution both as to form and 

 abundance are dealt with. The specimens were collected at two stations 

 on the west coast of Sweden, in the North Sea by various steamers, in 

 the Skagerak by steamer, and in the Shetlands. 



* The Naturalist, 1902, pp. 229-34. t Tom. cit, pp. 234-6. 



t Journ. Bot.. xl. (1902) pp. 226-8. § Irish Naturalist, xi. (1902) p. 119. 



|| Handl. K. Svensk. Vet.-Akad., xxxv. (1902) No. 5, 58 pp. (8 pis.). See Bot. 

 Centralbl.. lxxxix. (1902) p. 685. 



If Gothenburg, 1902, 51 pp. See Bot. Centralbl., torn, cit., p. 68b. 

 ** Handl. K. Svensk. Vet.-Akad., torn, cit., No. 7, 4'.' pp. See But. Centralbl., 

 torn, cit., p. 715. 



