With Ten Plates, Royal Aito, os. 
CONTRIBUTIONS'TO THE KNOWLEDGE OF RHABDOPLEURA 
AND AMPHIOXUS. 
By SiE KAY LANKESTER, K.C.B., M.A., LL.D., F.R.S, 
Loudon: J. & A. Chuechill, 7 Great Marlborough Street. 
Quarterly Journal of Microscopical 
Science. 
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