132 
SHADE 
TYPICAL QUEENSLAND LAGOON 
APPENDIx XIII. 
TEMPERATURE OF THE ATMOSPHERE AT THE LAGOON. 
(DEGREES FAHRENHEIT). 
Average Daily 
Period. Mean 
Temperature. 
For month of July, 1904 5 sis ae cas, gl 55.3 
August, 1904 .. ar 8 are 56.1 
September, 1904 Ae 5 ae 61.7 
October, 1904 .. An ve Ae | 68.7 
November, 1904 A ne bn 72.7 
December, 1904 ae a ee | 75.8 
January, 1905.. ce ns eo iA 79.5 
February, 1905 oe ac oe 78.3 
March, 1905 .. a is ae 74.9 
April, 1905 aye ate Bi od | 71.2 
May, 1905 ne ac ate fe 61.0 
June, 1905 aie ave ee ne 55.8 
Average Daily Mean Temperature for 12 months .. | 67.0 
EXTREME TEMPERATURES FOR ABOVE PERIOD. 
Date. 
15th June, 1905 Lowest Minimum Temperature > 
15th June, 1905 Uowest Daily Mean Temperature 4 
3rd January, 1905 Highest Max'mum Temperature .. ile 
5th January, 1905 Highest Daily Mean Temperature .. 9: 
NOTE. 
(DEGREES FAHRENHEI7). 
—The prevailing organism in the reservoir is described in this 
paper as Protococcus, because the dimensions of its cells correspond 
more closely with the dimensions of Protococcus infusionum— 
Rabenhorst (aquatic form)—than with those of any other similar 
organism ; the method of multiplication, by cell division, is also 
similar. In other respects, however, it agrees with descriptions of 
Clathrocystis mruginosa, Henfrey; but I have never observed the 
thallus in clathrate form, it having been always either saccate or 
broken up into small fragments. The diameter of the cells is 
given for C. wruginosa as 2.5—3.5 #, whilst the cells of our 
organism vary from 4.5—10 p. Like C. eruginosa, it appears on 
the surface of the reservoir ‘“‘as a bright green scum, sometimes 
glaucous, presenting to the naked eye a finely granular appearance, 
and when dried appearing like a crust of verdigris.”” Vide Cooke’s 
British Freshwater Algae. . Professor Moebius found the organism 
—C. sruginosa—associated with Peridinia in water brought by 
pipes from this reservoir, and collected by Dr. Thos. L. Bancroft, 
Vide Contributions to Queensland Flora, by F. M. Bailey, F.L.S., 
1893. The organism under discussion is always found associated 
with Peridinia, Anabcena, etc. 
HWe 
