26 LIST OF ANNUAL VOLUMES 

For tHe Twenty-ricutH Year, 1871. 
A Monograph of the Collembola and Thysanura. By Sir J. 
Lubbock, Bart., M.P., F.R.S. Seventy-eight Plates. 8vo. 

For tHE Twenty-nintH Year, 1872. 
A Monograph of the British Annelids. By W.C. McIntosh, 
M.D., F.R.S.E. Part I. Ten Plates. Imp. 4to. 
For tHE THIRTIETH YEAR, 1873. 
A Monograph of the British Annelids. By W. C. McIntosh, 
M.D., F.R.S.E. Part I. continued. Thirteen Plates. 
Imp. 4to. 
For THE THIRTY-FIRST YEAR, 1874, 
A Monograph of the British Spongiade. By J.S. Bowerbank, 
LL.D., F.R.S. Vol. III. Ninety-two Plates. 8vo. 
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For THE THIRTY-sECOND YEaR, 1875. 
A Monograph of the British Aphides. By G. B. Buckton, 
F.R.S. Vol. I. Forty-two Plates. 8vo. 

For tHe Tuirty-THIRD YEAR, 1876. 
A Monograph of the British Copepoda. By G. 8. Brady, 
M.D., F.L.S. Vol. I. Thirty-six Plates. 8vo. 
