With Ten Plates, Jtoi/al 4 to, os. 



CONTRIBUTIONS TO THE KNOWLEDGE OF RHABDOPLEURA 

 AND AMPHIOXUS. 



By E. IIAV LANKESTER, M.A., LL.D., F.R.S. 

 London : J. &; A. Chuhcuill, 7, Great Marlborougli Street, 



Quarterly Journal of Microscopical 



Science. 



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

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

 of the world. 



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

 now sold at an uniform price of 10/-. 



The issue of Supplement Numbers being found inconvenient, 

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

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

 such intervals as mny 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/-, and Four Numbers make up a 

 Volume. 

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



TO CORIIESPONDENTS. 



Authors of original papers published in the Quarterly Journal 

 of Microscopical Science receive twenty-five copies of their 

 communication gratis. 



All expenses of publication and illustration are paid by the 

 publishers. 



As a rule lithographic plates, and not woodcuts, are used in 

 illustration. 



Drawings for woodcms 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, 22k, Bartholomew Close, E.C., on 

 the following terms : 



For every four pages or less — 



25 copies .... 5/- 



50 „ .... 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 care 

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

 London, W. 



