president's address. 1215 



Rhizopoda. — Mr. Whitelegge has drawn up a list, p. 497, of the 

 Freshwater Rhizopocls found in the vicinity of Sydney, comprising, 

 at present, 2-4 species. 



Botany. — Mr. Haviland, in a paper, p. 173, on Oidium 

 monilioides, a fungus which does enormous injury to the various 

 species of Cucurbitacea? grown in field and garden, urges high 

 cultivation, and the consequent production of healthy and 

 vigorous plants, as the only treatment which is likely to be 

 practically serviceable against pests of such insidious character. 

 A series of papers has also been commenced by the same author, 

 in which the normal seasons of flowering are to be stated 

 authoritatively for all our indigenous flora, two numbers, for the 

 months of July and August, having already appeared, pp. 1048, 1103. 

 Mr. Whitelegge contributes a note on a specimen of Char a australis, 

 the cells of which are of extraordinary size, and very convenient for 

 examination under the microscope of the movements of the living 

 protoplasm. Mr. Haswell, p. 489, describes a simple method 

 for obtaining fine sections of delicate vegetable structures. Dr. 

 Woolls has a note, p. 929, on Lhidscea trichomanoides, from the 

 Currajong, and on the occurrence of Gvowea exalata in the same 

 locality and at Parramatta. Also, p. 859, on the distinction 

 between Eucalyptus leucoxylon, and E. sideroxylon, which have 

 been united in the Flora Australiensis under the former name 

 Mr. Trebeck gives an account of Mount Wilson, with an enumeration 

 and general description of its Ferns, with their various habitats. 

 Mr. A. G. Hamilton reports in like manner upon the Orchids 

 of the Mudgee district, with a table of their Australian distribu- 

 tion. Dr. Katz, who has been for some time encased on the 

 Bacteriological examination of the Sydney Water Supply, carried 

 on in the Laboratory which forms part of this institution, has 

 communicated the results of his inquiries, so far as they have 

 been prosecuted at present, in two papers, pp. 907, 1205. He also 

 gives an account of a remarkable Bacterium, a species of Strepto- 

 coccus found growing in some wheat ensilage at Coonong, Urana 

 district, which had apparently produced a serious epidemic among 

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