186 SUMMARY OF CURRENT RESEARCHES RELATING TO 



North west Bohemia. The region is described in detail. Diatoms de- 

 scribed by Ehrenberg, Grunow and Biber as fossil forms, are found 

 living in the waste water of the Kaiserquelle. Most of them are typical 

 brackish-water species. In the Kieselgur the predominant species are 

 Campylodiscm clypeus, Ammoeoneis sphserophora, Navicula hungarica, 

 Nitzxchia spectabilis, and Melosira crenulata. In the drainage ditches of 

 the Kaiserquelle the predominant species are St/nedra pulchella, S. affinis. 

 Amphora coffeseformis, Navicula hungarica, and species of Nitzsrhia. 

 Strata of different age occur in the Kieselgur. The Bacillarieae of the 

 Neusiedlersee agree closely with those of the Soos, according to 

 Pantocsek.' 



Algae of Thermal Waters.*— J. L. Lacsny records 112 species of 

 algae from the thermal waters at Nagyvarad. Among them is a new 

 variety, striata, of Nitzschia lamprocarpa. Only thirty-five species had 

 been previously recorded. The paper is in Hungarian. 



Bacillarieae from Hungarian Strata, f — J. Pantocsek gives an 

 account of sixty species and varieties of diatoms found in a grey soft 

 light stratum at Kopacsel in Hungary. Many of them are novelties. 

 The stratum was evidently laid down in brackish water. 



Fossil Diatoms. J — J. Pantocsek publishes a list of fifty-nine species 

 and varieties of diatoms from the Klebschiefer of Lutilla in Hungary. 

 The stratum was laid down in fresh-water, 25-30 C, in neolithic times. 

 New species and varieties are described. The paper is published in the 

 Magyar language, apparently as a separate publication, but a German 

 abstract appears in Hedwigia. 



Italian Fossil Diatoms.§— A. Forti publishes another number of 

 his Diatomological contributions, in which he gives the diagnosis, ac- 

 companied by critical notes, of the many new species, varieties and forms 

 of which he has written during the last few years. These writings have 

 been scattered in various periodicals The material here described and 

 figured is from the middle Miocene in Piedmont, Emilia, and Girgenti in 

 Sicily. 



Nuclear Division in Tetraspora lubrica.|| — F. McAllister gives a 

 resume of accounts that have been published of mitosis in Spirogyra and 

 various low Algae and Flagellatae, and describes his own investigations of 

 the nuclear structure and mitosis in Tetraspora lubrica. He finds it to 

 be essentially the same as in other Chlorophyceae, and gives the follow- 

 ing summary. The nucleus of Tetraspora in the resting condition has a 

 chromatic reticulum, net knots and nucleolus distributed in the same 

 manner as in the higher plants. A definite spireme is formed from the 

 reticulum ; and its segments form about thirteen chromosomes. The 



* Bot. Kozlemenyek, xi. (1912) pp. 167-85. 

 t Bot. Kozlemenyek, xii. (1913) pp. 126-37 (2 pis.). 



X A lutillai ragp. elofofd. Bacill. vagy Kovamoszatok leirasa. Pozsony (1913) 

 19 pp. (2 pis.). See also Hedwigia, liv. (1914) Belbl., p. 139. 



§ Atti R. 1st. Veneto Sci. Lett, Art., lxxii. (1912-13) pp. 1535-1700 (19 pis.) 

 || Ann. of Bot., xxvii. (1913) pp. 681-96 (1 pi.). 



