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containing the description of a new species of Bush-Shrike of the genus La- 
niarius, based on a specimen obtained in Ashantee by Mr. Godfrey Lagden, 
which he proposed to call Z. Lagdeni, after its discoverer. — Prof. Flower 
made some remarks on the chief points of interest exhibited by the Burmese 
Elephant now in the Society’s Gardens. — P. L. Sclater, Secretary. 
2. Linnean Society of London. 
7th February, 1884. — There was exhibited on behalf of Mr. Arthur 
C. Cole a box containing mounted preparations illustrative of his Studies 
in microscopic science, a work devoted to Animal and Vegetable Histo- 
logy now being issued in parts. — The second part of the Rev. A. E. Ea- 
ton’s Monograph on the Recent Ephemeridae or Mayflies was read in 
abstract. He takes into account the genera from Potamanthus to Callibetes 
inclusive. — Another paper read in abstract was a Catalogue of European 
and North Atlantic Crustacea by the Rev. A. M. Norman. In this an 
attempt has been made to gather together all the forms known and recorded 
of the above group. Notices of many of the species are only to be found in 
obscure periodicals etc. almost in every language consequently since the 
publication of Milne-Edwards’ »Histoire Naturelle des Crustacés in 1834« 
the numbers have increased threefold, hence revision has become highly 
necessary. — Mr. B. J. Lowne gave an interesting communication embo- 
dying his Researches on the Compound Vision of Insects. He compares 
the structures of the Simple Ocellus with those of the Compound Ocellus 
(common in larval insects) and with those of the Compound Eye. The com- 
pound eye according to him is but composed of aggregated Compound Ocelli, 
or the latter in the larval insect is merely equivalent to a single segment of 
a compound eye. He refers to the development of the compound eye and 
points out that in many larvae during moulting stages the »segregate« retina 
is finally replaced by another. He describes a deep spindle like layer in 
intimate Connection with the nervous structures and which he regards as 
playing an important part in the phenomena of compound vision, rather than 
that this kind of vision is solely dependent on the number of corneal facets. 
— J. Murie. 
21th February, 1884. — Mr. R. Miller Christy brought before 
the notice of the Society a series of Lepidoptera, Hymenoptera etc. captured 
by him in Manitoba, some of the Humble Bees being supposed new to 
Science. — A paper afterwards was read by Mr. Christy »On the power of 
penetrating the Bodies of animals possessed by the seed of Stipa spartea.« — 
A communication followed from Mr. Stuart O. Ridley »On some structures 
liable to variation in the subfamily Astrangiaceae (Madreporaria). Therein 
he remarks that although the columella has been taken in many groups of 
Madreporaria for distinguishing genera, yet a study of a series of specimens 
of Astrangiaceae (Phyllangia papuensis) shows that withim a single colony we 
may have the papillar and the trabecular forms, both to all appearance well 
developed, owing to the union in some cuticles of the trabeculae by a con- 
tinuous lamina. Similarly in the allied species P. dispersa, the costae, in- 
sisted upon in the description of the species of the genus by Mr. M. Miine- 
Edwards and Haime, may either be present or absent in the same colony. 
Thus great care must be exercised in the employment of columella and 
costae in the specific distinction of the Astrangiaceae. — J. Murie. 
