With Ten Plates, Royal ito, os. 



CONTRIBUTIONS TO THE KNOWLEDGE OF RHABDOPLEURA 

 AND AMPHIOXUS. 



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

 London : J. & A. Chuecuill, 7 Great Marlborougli Street. 



Quarterly Journal of Microscopical 



Science. 



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