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New Series, No. LXXXII. 



APRIL, 1881. 



Price 7s. 6d. 



THE 



QUARTERLY JO U UN A L 



OF 



MICROSCOPICAL SCIENCE 



KDITBD BY 



E. UAY LANKESTER, M.A., E.K.S., Y.Ij.)^., 



FeUov) of Exekr Coitege, Oxford, and Professor ofZoolo</y /niU Compuradue Aiiataiiiy in VaiversUy 



College, Loudon ; 



WITH THE CO-OPKRATION OK 



F. M. BALFOUR, M.A., F KS., F.L.S., 



Fellow and Lecturer of Triuity CoKege, CumlirhUje. 



\V. T. THISELTON DYER, MA., F.R.S., F.L.S. 



Assistant Director of ike lioyiil Gardens, Kew. 



AND 



E. KLECN, M.D., F.R.S., 



Leci'tirer on Histology in SI. Baitkoloiiiew's Hospif.ul Mniicat School, LuuJmh. 

 WITH LITHOGRAPHIC PLATES AND ENGRAVINGS ON WOOO. 



LONDON: 

 J. & A. CHURCHILL, NEW BURLINGTON STREET. 



MDCCCLXXXE. 



I. £. Adhtnl.j 



lemsBS^sm 



I.H;inliol e«- Cl'isc, 



