118 THE ZOOLOGIST. 



SCIENTIFIC SOCIETIES. 



LiNNEAN Society of London. 



February 7, 1884.— Sir John Lubbock, Bart., M.P., F.R.S., President, 

 in the chair. 



Mr. Henry Groves, of Florence, and Mr. F. L. Keays, of Cobham, were 

 elected Fellows. 



There was e.vhibited, on behalf of Mr. Artiiuv C. Cole, a box containing 

 mounted preparations, illustrative of his ' Studies in Microscopic Science,' 

 a work devoted to Animal and Vegetable Histology, now being issued 

 in parts. 



The second part of the Rev. A. E. Eaton's monograph, " On the Recent 

 Ephemeridm, or Mayflies," was read in abstract. In this he takes into 

 account tlie genera from Potainauthus (and end of group Pentayenia) to 

 Callibites inclusive, the part being accompanied by over twenty plates. 



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 Crustaces,' in 1834, 

 the numbers have increased nearly threefold, revision therefore becoming 

 highly necessary. 



Mr. B. T. Lowne contributed an interesting memoir embodying 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 compound eye, 

 according to him, is composed of aggregate compound ocelli, or the latter 

 in the larval insects is uierely 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 is dependent solely on the number of corneal facets. 



February 21, 1884. — Sir John Lubbock, Bart., M.P.,F.R S., President, 

 in the chair. 



Mr Alfred Prentice Young, of Bombay, and Mr. D. Sullivan, of Victoria, 

 were elected Fellows of the Society. 



Mr. R. Miller Christy brought before the notice of the Society a series 

 of Lepidoptera, Hymenoptera, &c., captured by him in Manitoba, some of 

 the Humble Bees being supposed to be new to science. 



