419 



1894 zurück. Bei Asterionella gracillima geht die Differenz gegen das 

 Vorjahr sogar bis über das 20fache hinaus. Auch von Cyclops oitho- 

 noides sind heuer sehr viel weniger Individuen vorhanden als 1894. 

 nämlich 319 000 gegen 905 000. 



Wenn E. Haeckelin Bezug auf das Meer gesagt hat. daß, wie 

 gute und schlechte Wein- und Obstjahre, es auch reiche und dürftige 

 Planktonjahre gebe , so hat das die völlig gleiche Anwendung auch 

 auf die limnetische Organismenwelt unserer Landseen. 



Die verschiedenen planktonischen Arten des Süßwassers gedeihen 

 in den auf einander folgenden Jahren auch nicht immer gleich gut. 

 sondern zeigen beträchtliche Schwankungen in ihren Mengenverhält- 

 nissen, deren genaue Feststellung aber sehr viel Zeit und Arbeit 

 erfordern würde. Ich muß mich hier damit begnügen, an der 

 Hand exacter Beobachtungen auf das Vorhandensein dieser merk- 

 würdigen Oscillationen hinzuweisen, die unter Bedingungen einzu- 

 treten scheinen, welche für Süß- und Salzwasserbewohner ganz die- 

 selben sind. 



2. Linnean Society of New South Wales. 



July 3 1 st. 1895. — 1) Catalogue of the described Coleoptera of Austra- 

 lia. Supplement Part I. — Cinndehdae and Curahidap. By George Masters. 

 It is proposed to give as far as possible a complete list of all the Australian 

 Coleoptera described since the year 1886, also to fill in the omissions pre- 

 vious to that date. The present part contains references to 429 species, be- 

 sides many corrections , and additional localities. — 2) Australian Termiti- 

 da^. Parti. By W. W. Froggatt, The author gives an account of the 

 distribution of Termites in general and of the damage done by them, and 

 passes on to a consideration of the habits and range of Australian forms, 

 concluding with a general account of the structure of the termitaria of both 

 the common mound-building species , and of those of Eutermes which form 

 arboreal nests as well as on the ground. — 3) and 4) Botanical. — 5) On 

 a new Cone from the Solomon Islands. By John Brazier, F.L.S. — Mr. 

 Brazier exhibited a fine specimen of the ringed snake {Vermicella annidata) 

 found under a large stone at the foot of the Waverley cemetery by Mr. 

 Worth. — Mr. Brazier also exhibited a specimen of Cardium vertehratum. 

 Jonas, from Keppel Bay, N. Queensland, named by Mr. E. A. Smith, of the 

 British Museum : and he contributed a Note showing that the species in 

 question has not so far been found on the coast of New South Wales, and 

 that the shell exhibited by Mr. Hedley at the last Meeting as C. vertehratum, 

 from Port Jackson, was not that species, but Cjlaviim, Linn. — Mr. A. H. 

 Lucas exhibited specimens of Honey Ants [Campon-itts inßatus) , and Li- 

 zards collected by Prof. Baldwin Spencer in Central Australia . during the 

 breeding season of 1895, comprising both sexes of Amphibolwut pic'us , A. 

 ma'^idatus, and A. reticulatus, showing the suxual colouring; Moloch horri- 

 dus (Ç). Also specimens of Egernia Stokesii and E. depressa^ the latter from 

 Coolgardie. — Mr. North exhibited a series of specimens of Zosterops cae- 

 rnlesrens , and pointed out the seasonal variations in the plumage of this 

 species. Z. caeridescnns of Latham [Z. dorsali s , Gould, Birds of Australia, 

 Vol. IV. pi. 81), with the deep tawny-buff flanks and the grey throat shows 

 the autumn and winter attire, and T. [Dactns] westernensis: Quoy and Gai- 

 raard (Voyage de l'Astrolabe, T. I. p. 216, and Atlas, plate 11, fig. 4) with 



