327 
plained the way in which it was intended to be used. — A communication 
was read from Mr. F. Moore, F.Z.S., containing the second part of a 
monograph of the sections Limnaina and Euploeina, two groups of Diurnal 
Lepidoptera belonging to the subfamily Euploemae. The present paper con- 
tained the descriptions of many new genera and species belonging to the 
group Euploeina. — Mr. Alfred Tylor, F.Z.S., read a paper on the colo- 
ration of animals, showing that the character of the ornament or decoration 
differs in the two great divisions of the animal kingdom — the Invertebrata 
and Vertebrata. Mr. Tylor pointed out that the law of emphasis, well known 
in architecture, was, in his opinion, applicable to natural history, and show- 
ed that the prominent characters of the animal are picked out in colour in 
precisely the same manner whenever colour is present. He divided his sub- 
ject into several sections, and exhibited illustrations of the more important 
families in coloured diagrams. — A communication was read from Dr. 
O. Boettger, of Frankfort-on-the-Main, containing the description of 
new species of landshells of the genus Clausiha from the Levant, collected 
by Vice- Admiral Spratt, F.R.S. — Mr. W. F. Kirby gave an account of 
a small collection of Hymenopterous and Dipterous insects obtained in the 
Timor-Laut group of islands by Mr. H. O. Forbes. — P. L. Sclater, Se- 
cretary. 
2. Linnean Society of London. 
3th May, 1883. — Wr. William Galloway exhibited an extensive 
series of the Osseous Remains of the Great Auk, Otter and other animals 
along with bone implements being part of the material dug out of the 
mound of Caisteal naw-Gillean, on Oronsay by himself and Mr. S. Greive 
in 1881—82. — A second Contribution on the Asteroidea of the Challenger 
Expedition, by W. Percy Sladen, was read. In this the author draws atten- 
tion to the »Cribriform Organs«, peculiar structures associated with special 
function found in Porcellanaster, but as yet unknown in other starfishes. The 
organs in question are situated on the marginal plates in the interbrachial 
angles and they may vary from one to seven in number. They consist of 
greatly compressed spinelets or lamellae ranged in vertical parallel lines, and 
invested with a membrane, which appears to have been furnished with vi- 
bratile cilia. Functionally they may act as percolators and be homologous 
with the minute ciliary spines bordering the vertical furrows of the marginal 
plates of Astropecten and other forms. In Porcellanaster they are strictly 
lamellae whilst they are papilliform in the allied genera of Hydraster, Styro- 
caster, and Thoracaster. Mr. Sladen further describes in detail the last 
mentioned three new genera of five in all, and of twenty seven species 
some twenty one are entirely new to science. — There followed a paper by 
Mr. George Brook, »A revision of the genus Enfomobrya Rond. (= Degee- 
ria Nicolet)«. In this communication a historical resumé is given of what 
divisions etc., of the group of Podurae more immediately under considera- 
tion have been made by previous observers. From researches into the 
literature and his own observations the author arrives at the conclusion that 
in the genus Hntomobrya we have a common widely distributed form which 
at different ages and under different conditions present gradations of colour 
from the light to the dark shade, and these have been named accordingly as 
separate sorts by various authors. Something of a similar kind has already 
