318 SUMMARY OF CURRENT RESEARCHES RELATING TO 



of collecting, and the location and character of the pools. Notwith- 

 standing variety of seasonal conditions and the character of the pools, 

 she found Spiroyyra almost uniformly present, the most frequent species 

 being 8. varians. Fourteen other species were found less frequently. 

 Mougeotia and Zygnema were associated with the Spirogyra. Oscillatoria 

 occurred constantly, but in small quantities. There seemed to be no 

 relation between the genera of alg^e produced and the character and 

 location of the pools. Diatomace* were invariably present, especially 

 NaiHcula, Synedra, Cocconema and Gomphonema. Fourteen other 

 genera were also recorded. Other algaj were best represented by 

 Closteri'um, Dictyosphserivm. and TJinohryon. In autumn and early 

 winter Vaucheria was usually present, but only appeared twice in the 

 spring. Fandorina and Feridinium appeared late in the year. 

 Oscillatoria appeared first in March and was constant thereafter. 

 Diatom-production was at its height in April and May at water 

 temperature varying between 8' and 1G° C, and declined markedly in 

 June. The desmids appeared in June, with a temperature between 

 15° and 20° C. The proportion of Dinohryon increased in the latter 

 portion of June. As regards reproduction, Spirogyra was found 

 conjugating in October, April and June ; Mougeotia in November, 

 December, May and June. Young sessile plants of UJothrix were seen 

 in April and May. In some of the pools the blanket-algae did not 

 reappear till May. 



AlgaB of the Komotau-Udwitz Lakes.*— J. Greger reports on the 

 algae of the Komotau-Udwitz group of lakes in Bohemia, six in all. 

 From five of these were recorded altogether o5 Schizophyceje, 6 Hetero- 

 kontse, 6G Chlorophycese, 58 Conjugatge, 43 Diatomaceaa. In the sixth, 

 the Alaun-see, the flora was small, mostly consisting of diatoms. Many 

 of the records are new for Bohemia. 



Fresh-water Algae of New South Wales.f — Gr. I. Playfair publishes 

 an account of the fresh-water algae of the Lismore district. New South 

 Wales. In a former paper he gave an account of the fresh-water algas of 

 the Richmond river at Lismore. The present paper deals with forms 

 found on land. The majority were collected in 1914 from lagoons, 

 swamps, rain-water pools, and roadside ditches, almost entirely within 

 the boundaries of the city of Lismore. The total number of species 

 collected on land is 273, as against 286 from the river. With certain 

 additions for the district, the total reaches 481 species collected within 

 a diameter of two miles. The author finds the same extraordinary 

 dearth of Protococcacefe in the swamps and lagoons as in the river 

 system. The Yolvocacege are well represented and plentiful, indeed the 

 predominance of the green flagellates is characteristic of the district. 

 The absence of Dinohryon is noticeable. A new large flagellate, 

 Tessella, is described, resembling Volvox, but corresponding in structure 

 and characteristics more to Vohmlina. The Desmidege number 15G for 



* Lotos, Ixii. (1914) pp. 115-23. See also Hedwigia, It. (1914) Beibl. p. 88. 

 t Proc. Linn. N.S. Wales, xl. (1915) pp. 310-62. 



