Misrelidnoous. oil 



cxcentrical position, on the side of the spot where tlic old nudeus 

 was. This shows tliat tlio lifpiid of the nucleus has the same double 

 origin as the ufj^fjre'^atioiis thoiiiselves. 



We must therefore rejrard these phenomena of cell-division as 

 occa-sioned by a fusion l)etween the protoplasm and the uuclfus of the 

 cell, a fusion wliich commences at the opposite poles of the nucdeus. 

 The nucleus only occupies the centre of the cell dunng periods of 

 repose; as soon as the activity of reproduction is manifested, the 

 nucleus ceases to be the centre of the system, and the points of 

 fusion become the places of convergence for the currents of sarcodo 

 which travel from all sides towards these new aggregations. The 

 new nuclei result from a partial litpiefaction of these aggregations ; 

 they are therefore composed of a mixture, in very different propor- 

 tions in different cases, of the substance of the old nucleus and the 

 protoplasm of the cell. — Comptts licndus, October 2, 1670, p. OtiT. 



Oil a Sjjecies of lapyx. By Prof. J. Wood-Mason. 



Prof. AVood-Masou oxliibited specimens of a species oiLtpi/.v which 

 he had recently found amojigst the decaying leaves and fungi at the 

 foot of a bamboo-clump in his own garden at Calcutta, and said: — 



*' This remarkable form of Arthropoda, which has not hitherto been 

 met with in India or, indeed, in any part of Asia, is of the greatest 

 interest, as belonging to a group the members of which are considered 

 by Sir John Lubbock to be the living representatives of a prinucval 

 form from which the great orders of insects have all originated. 

 Discovered many years ago in Algeria by M. Lucas, the eminent 

 French entomologist, lapyx solifiKjus, the type of the group, was 

 only made known to science in lb(i4, when Mr. Haliday described 

 and figured it in the ' Transactions of the Linnean Society of London.' 

 In the following year it was submitted to a more careful examination 

 by Meinert, who detected a pair of rudimentary appendages on each 

 of the seven anterior segments of the abdomen, just as in its allies 

 Campodcd and Nkoletid, in which latter, however, all the abdominal 

 segments appear to be thus furnished. Four species of the genus 

 have already been described, viz. : — lapyx' sollfuf/i'.'^, Haliday, from 

 Algeria, Switzerland, and various parts of Italy ; I. >'Sai(S!ii'rii, 

 Humbert, from Mexico : /. [/i'/c-'^, Brauer, from Cyprus ; and /. Wol- 

 lastoni, Westwood, from Madeira and an adjacent island. A fifth 

 ha.s now been discovered thousands of miles from the nearest of 

 those localities, in association with a large bright crimson-coloured 

 species oiAnourn, two species of Springtails, two or three Pselaphida\ 

 and five or six ^lyriopods, amongst whicli a I'oli/.venus (differing from 

 the European P. hu/Krus in having one instead of two pencils of silvery 

 hairs at the end of the body) and a species of the very remarkablo 

 geniLS KiColu2)en<lnJ!(i especially merit attention." — Proceedinys of the 

 Asiatic Societi/ of Benyal, August lJ>70. 



" On the Fecundation of the Eyy in the Common Foirl.'^ 

 In the 'Annals' for Xovoraber, p. .'^09, an unfortunate erratum 

 has occurred — the name of the author of Ihe pai)er under (he above 

 title being printed P. Tascukk: it should be 1'. 'I'aihior. 



