ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
77 
Notarisia, 1921, 32 , p. 165). Notes on the structure of the valves 
and on auxosporogenesis in certain diatoms of the following genera 
Thalassiosira , Coscino discus, Cyclotella, Stephanodicus. A. G. 
Micro-organisms of Bicarbonated and Saline Waters in Galicia.- 
B. Namyslowski (Bull. Intern. Acad. Sci. Gracovie , math.-nat. Ser. B., 
1914, 526-544, 2 pi. ; see also Bot. Gentralbl ., 1919, 140, 183). In the 
bicarbonated waters ferro-bacteria appear in considerable quantity, also 
Navicula mesolepta. Other species regularly occurring are — Achnanthes 
lanceolata , A. microcephalia , Gymhella amphicephala , G. cymhiformis , 
Stauroneis anceps and Van Heurchia vulgaris. Other diatom species are 
found, but more rarely. New teratologic forms of .Navicula mesolepta 
and Stauroneis anceps are recorded. In the superficial saline springs 
sixty species are recorded, some of them characteristic of such habitat, 
others flourishing equally well in saline or fresh water. Achnanthes 
brevipes shows an anomaly ; and certain individuals of Navicula 
interrupta from the “ Solec ” spring differ from the diagnosis in De 
Toni’s “ Sylloge Algarum.” Together with flagellates and bacteria and 
one fungus (Oospora salina), the number of micro-organisms recorded 
from seven subterranean saline waters is seventy-nine. E. S. G. 
Algal Flora of the Komotau-Udwitz Ponds.— J. Greger (Lot<>s, 
Brag., 1914, 62 , 115-23). The group of ponds embraced by this title 
consists of the Alaun- or Hiitten-see near Komotau, and four ponds by 
Udwitz, in Bohemia, forming a superficial area of about 40 hect. The 
Udwitz ponds are well known as resting-places for migrant birds, and 
also as nesting-places ; and being seldom disturbed, they offer a good 
situation for the development of algae, etc. The flora of the Alaun-see 
was very meagre, and consisted principally of Diatoms, owing to the 
presence of 1 p.c. of alum in the water. The number of species 
recorded for the four Udwitz ponds is 208, and that for the Alaim-see is 
but 21. New to the flora of Bohemia are : Scbizophyceae, 9 ; Chloro- 
phyceae, 13 ; Conjugate, 23 ; Diatomaceae, 27. E. S. G. 
Algal Flora of the Komotau-Udwitz Pond- group. II. — J. Greger 
(Beih. z. Bot . Gentralbl., 1920, 37 , 299-309 ; see also Hedwigia, Beiblatt , 
1921, 62 (85). A continuation of the work begun in 1913, and 
published in Lotos , 1914, p. 115. The phytoplankton of the Alaun-see 
shows a noticeable increase since 1913 — a sign that the alum content is 
constantly decreasing. Diatoms remain much the same as regards 
number of species ; Cyanophyceae and Chlorophycese show additions. 
Desmids still remain entirely absent. The migration of the filamentous 
algae from the banks towards the middle of the lake, to avoid the action 
of rain-water, has increased. It is clear that the colonization of the 
Alaun-see by plankton is proceeding. Diatoms still predominate and 
are evenly distributed. It is fairly certain that the majority of the 
species are introductions, and some of them will hardly survive. 
E. S. G. 
Algae of Moravia and their Distribution. — R. Fischer ( Verb . 
naturf. Vereins in Briinn, 1920, 57 , 94 pp., 1 pi., 2 figs, in text ; see 
