With Ten Plates , Royal 4 to, 5 s. 
CONTRIBUTIONS TO THE KNOWLEDGE OF RHABDOPLEURA 
AND AMPHIOXUS. 
By Sir ItAV LA-NK ESTER, K.C.B., M.A., LL.D., F.R.S. 
London: J. & A. Churchill, 7 Great Marlborough Street. 
Quarterly Journal of Microscopical 
Science. 
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for this sum (prepaid) the Journal is sent Post Free to any part 
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BACK NUMBERS of the Journal, which remain in print, are 
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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 
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TO CORRESPONDENTS. 
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