482 SUMMARY OF CURRENT RESEARCHES RELATING TO 



Thallophyta. 

 Alg-ae. 



(By Mrs. E. S. Gepp.) 



New Epiphytic Flagellates.* — J. Pavillard describes two new 

 Flagellates, epiphytic on pelagic diatoms. One, SoUnicola setigera, is the 

 type of a new genus, and has been described, though without a name, 

 by Gran in 190*2, and by Mangin in 1913. It is epiphytic on Dacty- 

 Uosolen. The organism is described in detail. The genus SoJenicola is 

 most closely allied to . Oikomonas. The second flagellate is Bkmca 

 mediterranea Pav., and was found plentifully on Cerataulina Bergonii, 

 Oliaetoceros anastomosans, Nitzschia seriata, and Skeletonema costatum. 



Australian Fresh-water Plankton. f—G. I. Playfair publishes a list 

 of Fresh-water Pbytoplankton (Protococcoidea?) which has been collected 

 at intervals during the past ten years from the suburbs of Sydney, and 

 from the neighbourhood of Lismore on the Richmond river. A few 

 records are also included from still earlier up-country gatherings at 

 Collector, and from certain samples which have been received from 

 places outside the State of New South Wales. The author revises also 

 the nomenclature of some of the plankton-forms noted in " Plankton of 

 the Sydney Water- Supply. "| The term plankton has been taken in a 

 wide sense to include material found floating in the water of river, lake, 

 lagoon, or pond, or shaken out of weeds in some depth of water. One 

 new genus is described, Bernardia, which contains two species formerly 

 included in Lagerheimia. The new species number eighteen, and the 

 new varieties thirty-seven. Critical notes are appended to many of the 

 records. 



Pelagic Diatoms of the Gulf of Lyons. § — J. Pavillard publishes 

 some researches on the pelagic diatoms of the Gulf of Lyons, and gives 

 a list of the species recorded. He adds interesting general observations 

 on epiphytism in pelagic diatoms, and the general aspect and periodic 

 evolution of diatomaceous plankton, with useful biological notes. 



Mastigocladus laminosus.|| — L. Buscalioni has investigated the 

 ramification of Mastigocladus laminosus, collected at the Baths of Valdieri. 

 He reviews and criticizes the work of Prof. Borzi on the subject in 

 his studies on Myxophycese, and then describes his own results, which 

 he summarizes as follows : — M. laminosus possesses both true and 

 spurious ramification. The former, however, in consequence of cellular 

 dislocation arising during the formation of branches and flagella, often- 



* Comptes Eendus, clxiii. (1916) pp. 65-8 (figs.). 

 t Proc. Linn. Soc. New South Wales., xli. (1917) pp. 823-52 (4 pis.). 

 X Proc. Linn. Soc. New South Wales, 1913, pp. 512-52. 



S Trav. Inst. Bot. Univ., Montpellier et Stat. ZooL, Cette s6r. mixt. M6in. 5 

 (1916) 63 pp. (2 pis. and 5 figs.). 



II Malpighia, xxviii. (1917) pp. 83-96. 



