(23) 
Neuenstein, H. von. Über den Bau des Zellkerns bei den Algen und seine Bedeutung 
für ihre Systematik. (Arch. f. Zellforschung XIII [1914], p. 1-91, 20 Fig.) 
Oestrup, E. Marine Diatoms from the Coasts of Iceland. (Botany of Iceland I [19161, 
p- 347, 394, PI. I.) 
Okamura, K. History of Phycology in Japan. (Bot. Magazine Tokyo XXX [1916], 
: P- (—(24).) 
— List of Marine Algae collected in Caroline Islands, 1915. (Ibidem p- 1-14, Pl. I, 
9 Fig.) 
— Undaria and its Species. (Ibidem XXIX [1915], p. 266—278, Pl. XL.) 
— History of Phycology in Japan. (Ibidem p. (1)—(24\. Japanisch.) 
— Icones of Japanese Algae Vol. III, N. IX—X, Vol. IV, N. I. (Tokyo 1915—1916.) 
— Onda, Keisuke and Higashi, M. Preliminary Notes on the Development of the 
Carpospores of Porphyra tenera, Kjellm. (Tokyo Bot. Mag. XXXIV [1920], 
p. 131—135.) 
Orton, J. H. Preliminary Account of a Contribution to an Evaluation of the Sea. 
(Journ. Mar. Biol. Assoc. of the United Kingdom, N. Ser. X [1914], p. 312—326.) 
Ostenfeld, C. H. De Danske farvandes Plankton i aarene 1898-1901. Phytoplankton 
og Protozoer. 2 Protozoer; Organismer med usikker Stilling; Parasiter i Phyto- 
planktonter, med 4 Figurgrupper og 7 Tabeller i Teksten. (Kgl. Dansk Vidensk. 
Selsk. Skrift. Nat. og Math. Afd. 8 Raekke H. 2 [K@benhavn 1916], p. 115—197.) 
Osterhout, W. J. V. Tolerance of fresh water by marine plants and ist relation to 
adaptation. (Bot. Gazette LXIII [1917], p. 146-149.) 
Oye, P, van. Über das Plankton des Tjiliroveng-Flusses bei Batavia (Niederl. Ost- 
indien). (Intern. Rev. gesamt. Hydrobiol. u. Hydrographie IX [1920], p. 160—165.) 
— Kurzer Beitrag zur Kenntnis von Pithophora sumatrana (Mart.) Wittr. (Hedwigia 
LXIII [192]), .p. 43—47.) 
Palmer, T. Ch. The Collecting and Preparation of Diatoms. (Proceed. Amer. Nat. 
Sci. Philadelphia LXV [1913], 1914, p. 380—381.) 
Paravieini, E. Notizen zur Flora und Fauna des Goktschesees in Hocharmenien. 
(Archiv f. Hydrobiol. u. Planktonk. X, p. 414-416.) 
Paulson, Rob,, and Hastings Sommerville. The Relation between the Alek and Fun- 
gus of a Lichen. (Journ. Linn. Soc. Bot. XLIV [1920], p. 497—-506, Plates 
RXTIXXIE) 
Ariane J. Accroissement et scissiparit& chez les Peridiniens. (Compt. Rend. Acad. 
. Paris CLX [1915], p. 372, Fig.) ; 
rs, en nouveaux du Golfe du Lyon. (Compt. ‚Rend. oc. Biol. Paris LXXVIII 
[1915], p 120—122, Fig.) 
—— Flagellös nouveaux, epiphytes des diatomees. (Compt. Rend. Acad. Sci. CLXIII 
[1916], p. 6568.) 
— Recherches sur les Peridiniens du Golfe du Lyon. (Trav. Inst. Botan. de l’Univ. 
Montpellier et de la Station Zoolog. de Cette, serie mixte, M&em. No. 4 [1916], 
p- 9-70, Pl. I—-II.) 
— Recherches sur les Diatome&es TAETER du Golfe du Lion. (Ibidem Mem. No. 5 
[1916], 63 pp., Pl. I—-II, Fig. 1—5.) 
Pease, V. A. North Pacific coast species of Desmarestia. (emsru Sonne Mar. Stat. 
Publ. I [1917], p. 383—394, 2 Plates.) 
P&choutre, F. La Sexualit& heterogamique des Laminaires et la ERBEN chez 
les Algues pheorporses. (Revue gener. des sciences 1916.) 
Petersen, J, B, Studier over Danske atrofile Alger. (Kgl. Danske Vidensk. Selsk. 
Skrift. 7. R. Naturv. og mathem. Afd. XII [1916], p. 269-380, 4 Tab.) 
®. 
