500 NOTES AND EXHIBITS. 



surface at low water, and these are covered with Posidonia^ 

 Possibly the black swans, which feed on the shoots, may play 

 their part in setting free the fibres. (See a paper on " Water- 

 rolled Weed-Balls," by A. H. MacKay, Proc. Trans. Nova 

 Seotian Inst. Science, xi., p. 667, 1908). 



Drs. Petrie and Chapman exhibited a photographic plate which 

 had been exposed in the dark to the emanation of the dried juice 

 of Euphorbia peplus. A definite imprint of the characters 

 written with the juice was produced on the plate. Ether 

 extracts of the juice contained the active substance. 



Mr. E. C. Grey exhibited fatty acids obtained from human 

 brain, comprising, besides the fatty acids already known to occur 

 in combination as lipoids of brain, two specimens of fatty acids, 

 the presence of which has not been previously made known. The 

 fatty acids were separated into a liquid and a solid portion; the 

 former has been shown to contain linoleic acid as well as oleic 

 acid. The solid portion was separated into fractions, which were 

 exhibited, one of them consisting of a fatty acid of high molecular 

 weight, not previously found in the brain. 



Mr. Cheel exhibited an interesting series of Pungi, including 

 TRiCHiACEiE : Lycogala epidendruni Rost.j on bark; National 

 Park(F. Hallman; November, 1908) — Pucciniace/E : Puccinia 

 haemodori P. Henn; host, leaves of Conostylis aurea Link; Perth, 

 W^A.(H. Deane; November, 1908). P. Morrisoni McAlp.; bost, 

 Pelargonium australe Willd.; Cowcowing, W.A. (Max Koch; 

 September, 1904). P. ?a^e7iop/<o?YC Cke., gscidia-stage only; host, 

 leaves of Lagenophora Billardieri Cass.; Mount Victoria (E. 

 Clieel; December, 1900). P. dampierce Syd.; host, Dampiera 

 leptoclada Benth., and D. spicigera Benth.; Albany and Murchi- 

 son, W. A.(ex herb. E. Pritzel). — Thelephorace^ : Thelephora 

 terrestris Ehrh.; on the ground, among leaves; Penshurst (E. 

 Cheel; August, 1907). — DEMATiACEiE : Cercospora viticgla (Ces.) 

 Sacc; host, vine-leaves ( F^^^s vinifera Linn.); Penshurst and 

 Schofield's (E. Cheel; August and December, 1908). 



Mr. A. F. Basset Hull submitted a copy of " A List of the 

 Birds of Australia," &c., comprising 904 species, recently com- 

 piled and published for the use of collectors and others. 



