With Ten Plates, Itoi/al Ato, Zs. 



CONTRIBUTIONS TO THE KNOWLEDGE OF RHABDOPLEURA 

 AND AMPHIOXUS. 



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

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



Quarterly Journal of Microscopical 



Science. 



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