U 'ith Ten Plates, Rot/al ifo, 5s. 



CONTRIBUTIONS TO THE KNOWLEDGE OF RHABDOPLEURA 

 AND AMPHIOXUS. 



By Sib HAY LANKESTER, K.C.B., M.A., LL.D., F.R.S, 

 Loudon: J. & A. ChurCHIMj, 7 Great Mailboiougli Street. 



Quarterly Journal of Microscopical 



Science. 



The SUBSCRIPTION is £2 for the Volume of Four Numbers; 

 for this sum {prepaid) the Jodknal is sent Post Free to any part 

 of the world. 



BACK NUMBERS of the Journal, which remain in print, are 

 now sold at an uniform price of 10/- net. 



The issue of Supplement Numbers being found inconveuieutj 

 and there beiug often in the Editor's hands an accumulation of 

 valuable material, it has been decided to publish this Journal at 

 such intervals as may seem desirable, rather than delay the appear- 

 ance of Memoirs for a regular quarterly publication. 



The title remains unaltered, though more than Four Numbers 

 may be published in the course of a year. 



Each Number is sold at 10/- net, and Four Numbers make 

 up a Volume. 

 London : J. & A. CHURCHILL, 7 Great Marlborough Street. 



TO CO RRESP ONDENTS. 



Authors of original papers published in the Quarterly Journal 

 of Microscopical Science receive fifty copies of their communica- 

 tion gratis. 



All expenses of publication and illustratiou are paid by the 

 publishers. 



Lithographic plates and text-figures are used in illustration. 

 Shaded drawings intended for photographic reproduction as half- 

 tone blocks should be executed in '' Process Black " diluted with 

 water as required. Half-tone reproduction is recommended for 

 uncoloured drawings of sections and of Protozoa. 



Drawings for text-figures should not be inserted in the MS., 

 but sent in a separate envelope to the Editor. 



Contributors to this Journal requiring extra copies of their 

 communications at their own expense can have them by applying 

 to the Printers, 



Messrs. Adlard & Son, 23, Bartholomew Close, E.C., on 

 the following terms : 



For every four pages or less — 



25 copies .... 5/- 



50 .. .... 61- 



75 „ .... 6/6 



100 ,, .... 7/- 



Plates, 2/- per 25 if uncoloured; if coloured, at the same rate for 



every colour. 

 Prepayment by P.O. Order is requested. 

 All Communications for the Editors to be addressed to the cake 

 OP Messrs. J. & A. Churchill, 7 Great Marlborough Street, 

 London, W. 



