With Ten Tlates, Royal ito, os. 
CONTRIBUTIONS TO THE KNOWLEDGE OF RHABDOPLEURA 
AND AMPHIOXUS. 
By Sir HAY LANKESTER, K.C.B., M.A., LL.D., F.R.S. 
London: J. & A. Chuhchill, 7 Great Marlborough Street. ' 
Quarterly Journal of Microscopical 
Science. 
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