330 JOURNAL OF SCIENCE. 
gastral cavity and ciliated chambers, the authors draws the con- 
clusion that the mesoderm is the active part in transforming the 
shape, and so initiating higher development, whilst the entoder- 
mal layer, passive in itself, is folded. 
5. “* Addenda to the Australian Hydromeduse,” by R. von 
Lendenfeld, Ph D. Nine new species and a few previously insuffi- 
ciently known ones are described and figured in this paper by the 
author. It forms an addendum to the Monograph ot Australian 
Hydromeduse published by Dr. von Lendenfeld in previous Pro- 
ceedings of this Society. It brings the total number of Australian 
species up to 241. 
6. ‘‘On Colour-varieties of Scyphomeduse,’”’ by R. von Len- 
denfeld, Ph.D. The author here calls attention to a change of 
colour from blue to brown, which appears to have taken place in 
Crambessa mosaica during the last forty years. C. mosaica in Port 
Philip still remains blue, but in Port Jackson its colour has been 
altered in a greater or less degree by the presence of symbiotic 
Algz. Cyanea amaskala is also shown to exhibit two remarkably dis- 
tinct varieties, one from each of the localities referred to above. 
7. “The Metamorphoses of Bolina Chum,” by R. von Lenden- 
feld, Ph.D. In this paper the author describes the postembryonal 
development of a new species of Ctenophora obtained by him in 
great numbers after an easterly gale in Port Jackson. This is the 
first Ctenophore which has been observed on the coast of New 
South Wales. 
8. ‘Revision of the marine Tzenioglossate and Ptenoglossate 
Mollusca of New Zealand,” by Captain F. W. Hutton, F.G.S., 
Hon. Memb. Linn. Soc. N.S.W. The correct synonyms and locali- 
ties of each species are given in detail, along with a record of those 
which have been wrongly placed by authors in the list of New 
Zealand species. 
Dr. Cox read notes which he had received from Mr. Benjamin 
Hinde, R.N., of H.M.S. Diamond, on the poisonous effects of the 
bite inflicted by the Conus geographicus, Linn., on the natives of 
New Britain. An instance had been recorded by Mr. Arthur 
Adams ot the poisoned wound produced by the bite of Conus aulicus, 
Linn. The Rev. W. Wyatt Gill had recorded the fatal effects of 
the bite of the Conus textilis, Linn., and Mr. Brazier had informed 
Dr. Cox that he had known severe effects caused by the bite of 
the Conus tulipa, Linn. This was the first instance Dr. Cox had 
heard of the poisonous effects of Conus geogvaphicus. 
Sydney, 29th October, 1884.—C. S. Wilkinson, Esq., F.L.S., 
F.G.S., President, in the chair. 
New members—Messrs. L. F. Woolrych, of Newtown, and 
Jean Lison, of Noumea, New Caledonia. 
Papers.—1. ‘Suggestions as to the Mode of Formation of 
Barrier-Reefs in Bougainville Straits, Solomon Group,” by H. P. 
Guppy, M.B., Surgeon R.N. The author confines his remarks to 
the Shortland Islands, the main sland ot which, ‘“‘ Alu,” is composed 
of volcanic and coral formations, and uponit are two inland ridges 
representing ancient lines of barrier-reets built upon consolidated 
calcareous ooze; whilst to jthe south-east of the island are two 
lines of elevated barrier-reefs with interior lagoon channels. The 
