1 . PROCEEDINGS, SEPTEMBER. 



Norwegian North Atlantic Expedition, 1876-8, XVIII,, A and B. 

 " The North Ocean— its Depths, Temperature, and Circulation." By 

 H. Mohn. With 48 plates and 3 woodcuts. — From the Department. 



Proceedings of the Linn^an Society of New South Wales, second series. 

 Vol. 2. Part 2.— From the Society. 



Results of Meteorological Observations made in New South Wales 

 during 1885. — From the Government Astronomer. 



Scientific Transactions of the Royal Dublin Society, Vol. 3. Series 2. 



XI. — On New Zealand Coleoptera. With descriptions of new genera 

 and species. — By D. Sharp, M.B. 



XII.— The Fossil Fishes of the chalk of Mount Lebanon, in Syria. — 

 By James W. Davis, F.G.S. 



XIII. — On the cause of Iridescence in Clouds. — By G. Johnstone 

 Stoney, M.A., etc. Vol.5. N.S. July, 1886. Part 3. October, Part 

 4. January, 1887. Part 5. April, Part 6.— From the Society. 



Statistics of the colony of New Zealand for the year 1886. Results of 

 the Census of the colony of New Zealand, taken for the night of the 

 28th March, 1886. Sickness and Infirmity, Laud, Stock, etc., 

 Industries, Land and Building Societies, Public Libraries, IMechanics 

 Institutes, Places of Worship, Maori Census. — From the Department. 



The Times, London, June 22, 1887, containing an account of the 

 jubilee. — From Mr. Justin Browne. 



Transactions of the Wagner Free Institute of Science of Philadelphia, 

 Vol. 1. — From the Trustees. 



Transactions of the Geological Society of Australasia, Vol. 1. Part 

 2. — From the Society. 



Verhandlungen der Gesellschaft Fllr Erdkunde Zu Berlin. Band, 

 XIV., No. 5, 6,— From the Society. 



. Mr. Saville-Kent, F.L.S., F.Z.S., read a paper on the accli- 

 matisation of the true salmon [Salmo salar) in Tasmanian waters, 

 and upon the reported salmon disease afi^ecting the fish under 

 cultivation at the breeding establishment on the river Plenty. He 

 pointed out that the disease was more or less prevalent amongst the 

 fish at every breeding season, and was caused by the growth upon 

 some wounded or abraded surface of the fishes skin of a species of 

 aquatic fungus, known technically by the name of Saproleqnia ferax. 

 Continuing, he said — " The spores or germs of this fungus are almost 

 constantly present in pond or river water and naturally germinate and 

 flourish luxuriantly upon any submerged dead or putrifying animal 

 matter. The mildew-like growth that develops upon dead flies immersed 

 in water represents one phase of this fungus, and I exhibit this evening 

 samples of it growing on pieces of dead fish and mussel that have been 

 purposely cultivated for the occasion. Also fragments of the felt or 

 paper like masses characteristic of the growth of this Saprolegnia upon 

 diseased fish, and which have been detached from one of the salmon 

 that recently died at the Salmon Ponds. Mounted specimens, illus- 

 trating the more minute structure of this fungus, are exhibited in the 

 adjacent microscopes. This more minute structure as there shown, and 

 which I have also delineated on the accompanying diagram, consists 

 ■of an interlacing network of branching threads or hyphje, commonly 

 called the " mycelium " of the fungus, and from which arise erect sub- 

 cylindrical or club-shaped seed capsules or "sporangia." Within each 

 such sporangium may be developed several hundred microscopic seeds or 

 zoospores, every one of which, should it alight upon congenial soil, 

 such as a sore on a fish's back or any dead animal matter, is capable 

 of developing into an extensive fungus colony. Millions of these 

 minute seeds or zoospores may be developed from a single tuft of 



