623 
früher angab°, findet nicht statt. Das kugelformige Ende der Härchen 
müßte sich einigermaßen verändern und scheibenförmig werden, so- 
bald es mit dem Glase in Berührung käme, und das geschieht nicht. 
Der Fuß kann auch viel zu schnell angelegt und wieder zurückgezogen 
werden, was nicht so leicht geschehen könnte, wenn der Luftdruck 
dabei im Spiele wäre. 
Amsterdam, 20. September 1884. 
III. Mittheilungen aus Museen, Instituten etc. 
1. Linnean Society of New South Wales. 
24th September 1884. — 1. New Fishes in the Queensland Museum. 
No. V. By Chas. W. De Vis, M.A. Over 30 new species are described 
in this Paper; belonging to the Families Atherinidae, Mugihdae, Pomacentri- 
dae, and Labridae. A new genus (Onar) is added to the Pomacentridae. — 
2. Observations on the Temperature of the Sea on the East Coast of Austra- 
lia. By N. de Miklouho-Maclay. The Paper gives in a tabular form 
the result of the Baron’s own observations on various parts of the Coast in 
the month of July of the years 1878 and 1883. — 3. On two new species 
of Macropus from New Guinea. By N. de Miklouho-Maclay. These 
species, named respectively Macropus Jukesü and Macropus gracilis, are from 
the neighbourhood of the Mount Owen Stanley Range. — 4. A Monograph 
of the Australian Sponges. Part. III. ByR. von Lendenfeld, Ph.D. 
In this Paper the Calcareous Sponges, belonging to Polejaeff’s Group Ho- 
mocoela are described. A new species, a representative of a new Family, 
which connects the Homocoela with the Heterocoelia is described in detail 
by the Author. From the fact that the Entoderm cells are all alike, and that 
nevertheless a complication occurs as in the Syconidae, in the gastral cavity 
and ciliated chambers, the Author draws the conclusion that the Mesoderm 
is the active part in transforming the shape and so initiating higher develop- 
ment, whilst the Entodermal layer, passive in itself, is folded. — 5. Addenda 
to the Australian Hydromedusae. By R. von Lendenfeld, Ph.D. Nine 
new species and a few previously insufficiently known ones are described 
and figured in this paper by the author. It forms an addendum to the Mo- 
nograph of Australian Hydromedusae published by Dr. von Lendenfeld in 
previous Proceedings of this Society. It brings the total number of Austra- 
lian species up to 241. — 6. On Colour-varieties of Scyphomedusae. By 
R. von Lendenfeld, Ph.D. The author here calls attention to a change 
of colour from blue to brown, which appears to have taken place in Cram- 
bessa mosaica during the last forty years. C. mosaica, in Port Phillip still 
remains blue, but in Port Jackson its colour has been altered in a greater or 
less degree by the presence of symbiotic Algae, Cyanea Annaskala is also 
shown to exhibit two remarkably distinct varieties, one from each of the lo- 
calities referred to above. — 7. The Metamorphoses of Bolina Chuni. By 
R. von Lendenfeld, Ph.D. In this paper the author describes the 
postembryonal development of a new species of Ctenophora obtained by him 
5 Quart. Journal of microscop. Science. 1854. 
