180 MORPHOLOGY AND TAXONOMY, ALGAE [Box. Absts., Vol. X, 



MORPHOLOGY AND TAXONOMY OF ALGAE 



E. N. Transeau, Editor 

 L. H. Tiffany, Assistant Editor 



(See also in this issue Entries 948, 970, 977, 1247, 1348, 1358, 1393) 



1197. BuscH, W. Beitrag sur Kenntnis der Coccolithophoridae. [Contribution to our 

 knowledge of the Coccolithophoridae.] Arch. Naturgesch. Abt. A 85: 50-54. Fig. 1-2. 

 1919 [1920]. — Descriptions of Syracosphaera atlantica n. sp. (S. spec. Lohmann?) and 

 Coccolithophora leptopora (Muw. & Blackm.) Lohmann are presented. — C. E. Allen. 



1198. Gleisberg, Walther. Beitrag zur Algenflora des Proskauer Teichgebietes. 

 [Contribution to the algal flora of the Proskau group of ponds.] Ber. Deutsch. Bot. Ges. 38: 

 199-207. Fig. 1-2. 1920. — A list of Desmidiaceae and Protococcales collected by the author, 

 and of additional members of the same groups reported by Kirchner, in a group of ponds near 

 Proskau is presented together with brief notes on the ecology of the ponds and on several new 

 varieties. — R. M. Holman. 



1199. J0RSTAD, IvAR. Unders0kelserover zygoternes spiring hos Ulothrixsubflaccida Wille. 

 [Investigations on the germination of zygotes of UlothrLx subflaccide.] Nyt. Mag. Naturvi- 

 denskab. 56:61-68. Fig. 1-25. 1919. — J0rstad has described the germination of the resting 

 spores of Ulothrix subflaccida, a marine member of the genus. He reviews the work of Dodel 

 and Klebs on the fresh water species, Ulothrix zonata. According to Dodel, the contents of the 

 zygote, after a relatively long period, divides into 2-14 non-motile cells, each showing an eye- 

 spot and an organ for attachment. Klebs observed in cultures the formation of ' 'zygotes" with 

 and without conjugation. In about a month both kinds germinated readily, producing 2^ non- 

 motile cells without eye-spot. Further, no organ of attachment was observed. Klebs sug- 

 gested that the resting cells which germinated by forming 2 cells were non-sexual while the 

 others, producing in germination 4 cells, were formed by the fusion of gametes. — J0rstad's 

 observations agree in the main with those of Dodel. He describes the resting cells or zygotes 

 as generally spherical, sometimes egg-shaped, frequently with an attachment organ, and very 

 variable in size. On germination the contents divides into a considerable number of cells, as 

 many as 14, depending upon the size of the z3'gote. These cells are non-motile, have no 

 eye-spot, and the chromatophore can not be readily seen, although the pyrenoid is evident. 

 The cells may form new filaments before escaping from the zygote wall. — A. Gundersen. 



1200. Rose, M. Recherches biologiques sur le plankton. [Biological researches on plank- 

 ton.] Bull. Inst. Oceanograph. Monaco 385. 16 p. 1921. — The work was done with copepods, 

 but the methods are of interest in that they may be largely paralleled by workers on phyto- 

 plankton. — T. C. Frye. 



1201. Sauvageau, Camillb. Observations biologiques sur le Polysiphonia fastigiata, 

 Grev. [Biological observations on Polysiphonia fastigiata.] Recueil Trav. Bot. N^erland. 

 18: 213-230. Fig. 6. 1921. — Polysiphonia fastigiata is not an epiphyte but a parasite; the 

 rhizoids are endophytic in character. The exclusive presence on Ascophyllum and Fucus 

 argues for an adoption of the parasitic habit, though the species appears less on the latter than 

 on the former. Notwithstanding its parasitic nature, the spores easily germinate in cultures 

 and form small plants. — J. C. Th. Uphof. 



1202. Schr5der. Bruno. Schwebepflanzen aus dem Saabor-See und aus den grosseren 

 Seen bei Liegnitz. [Phytoplankton from Saabor Lake and from the larger lakes near Liegnitz.] 

 Ber. Deutsch. Bot. Ges. 38: 122-135. 1920. — The author enumerates the forms collected with 

 plankton net in 5 small Silesian lakes, presents a table of the distribution in these lakes of the 

 92 species found, discusses the ecology of certain of the forms, and describes new or critical 

 organisms which were encountered. The new species are Scenedesmus arthrodesmiforme and 



