Feb. 20, 1879] 



NATURE 



cxxvii 



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NOTES BY A NATURALIST ON THE " CHALLENGER." Being an Account of 

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MAROCCO AND THE GREAT ATLAS, JOURNAL OF A TOUR IN. By Sir J. 



D, HOOKER, K.C.S.I., C.B., F.R.S., and JOHN BALL, F.R.S., with Appendices, including a Sketch of the Geology 

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