Algae. 51 



ciirvata Grün. Cymbella Cistula Kirch. C. CistiiL ß inaculata V. H. C. 

 tumida. C. lanceolata Kirch. C. cuspidata Kirch. C. caespitosum 

 Schulz. Amphora ovalis Kütz. A. linealata Ehrb. Epithemia turgida 

 Kütz. E. Sorex Kütz. E. Zebra Kütz. E. Zebra Kütz. var. g. porellus 

 Grün. E. gibba Kütz. v. ventricosa V. K. Bacillaria paradoxa Gmel. 

 Hantzschia amphiatis Gm. Nitzschia sigmoidea W. Sm. N. palea 

 W. Sm. var. fonticola Grün. Nitzschiella aciciilaris Runensch. Cyma- 

 topleiira elliptica W. Sm. C. Lolea W. Sm. Surirella robiista Ehrb. 

 5. robusta var. splendida V. H. 5". ovalis v. miniita V. H. 5". angiista 

 Kütz. S". pinnata W. Sm. 5. spiralis Kütz. Closterium littorale Gay. 

 C moniliferum Ehrb. C bioculafum Breb. Hyalotheca dissiliens Breb. 

 Zygnema sp. Spirogyra Spreeiana Rabenh. vS. Weberi Kütz. 5". //e///s 

 Gl. 5". crassa Kütz. Sirogoniiim stichita Wille. Goniuni pectorale Müll. 

 Pandorina Morum Gay. Eudorin Elegans Ehrb. ro/vox a«/-ea Ehrb. 

 Dictyosphaeriiim Ehrenbergianiim Naeg. Selenosphaerimn Hatheris Cohn. 

 Gloeochaete Wittrockiana Lagerh. Oocystis solitaria Witt. Raphidium 

 fasciculatum Kütz. or. aciculare Chod. /?. fasciculatum Kütz. /i fascicnlatum 

 Chod. /?. /ßsc. Kütz. fJ. Spirale Chod. Crucigeria rectangularis Chod. 

 Scnedesmus acuminattis Chod. 5. ac. v. biseriatus, S. obtusus Meyen. 

 V. serratus Chod. 5. obtusus Meyen. ß alternans Chod. 6". arcuatus Lemm. 

 5. Hystrix Lagerh. 5. Hystrix Lagerh. ('^ armatus Chod. Characium 

 subulatiim A. Br. Ophiocytum cochleare A. Br. Sciadium arbuscula A. Br. 

 Pediastrum Ehrenbergii A. Br. v. tetrus. P. Ehrenb. v. biradiatum. P. 

 pertusum Kütz. Coelastrum sphaericum Naeg. Hydrodictyon reticulatum 

 Lagerh. Enteromorpha intestinalis Limp. Ulothrix subtilis Kütz. 

 Ulothrix inaequalis Kütz. Conferva bombycina Wille. Oedogonium sp. 



W. Arnoldi (Charkow). 



Turner, Charles, The Development of Cocconema Cistula 

 (Diatomaceae). (Annual Report and Transactions of Man- 

 chester microscopical Society 1903. Published july 20, 1904. 

 p. 88—91. Plate V.) 



This paper contains a description of the development of Cocconema 

 Cistula from a minute spore, as traced by the author. The spore is of 

 a brown colour and contains four dark brown nuclei. The spore increa- 

 ses in size and four diatoms are formed within the protoplasm the 

 frustules being gradually secreted and deposited around the four nuclei. 

 Sometimes the spore encloses only 1^ 2, or 3 diatoms respectively. 



E. S. Gepp-Barton. 



Yendo, K., A Study of the Genicula of Corallinae. (Journ. 

 of the College of Science, Imp. Univ. Tokyo, Jap. Vol. XIX. 

 Art. 14. 1904. 44 pp. With 1 pl. and 2 textfigg.) 



After a short introduction, the author writes in the foUowing 

 chapters : External appearence of genicula; The position of genicula, 

 normal and abnormal; Relative position of the genicular and the arti- 

 cular cells; Structure of genicular cells and comparison with articular 

 cells; Formation and development of the geniculum; The difference in 

 the properties of the cell wall of articular and genicular cells ; and finally 

 in the chapter „The value of the geniculum as a systematic character", 

 the author concludes „that the morphological characters, both the inner 

 and the outer ones_, of the genicula may play some important part in 

 systematic survey". He further adds „It may not be a generic character; 

 but at least a group may be more sharply defined by peculiarities 

 of the genicula, than by the mere external forms of the articulation". Litera- 

 ture is enumerated at the end of the work. K. Okamura. 



4* 



