March 30, 1920. 



Price lis. 



THE JOURNAL 



OF 



THE LINNEAN SOCIETY. 



Vol. XXXIV. 



ZOOLOGY. 



No. 227. 



CONTENTS. 



Page 



I. A Post-Pnernlus Stage of: Jasus lalandii (Milne Edw.), Ortmann. 

 By J. D. F. Gilchrist, M.A., D.Sc, Ph.D., F.L.S., Professor 

 of Zoology in the University of Cape Town. (Plates 15 & 18, 

 and 13 Text-figures.) 189 



II. On the Linnean Species of Non-Marine Mollusca that are repre- 

 sented in the British Fauna, with Note3 on the Specimens of 

 these and other British forms in the Linnean Collection. By 

 A. S. Kennard, F.G.S., and B. B. Woodward, F.L.S 203 



III. The Exoaonecc. By W. A. Haswell, M.A., D.Sc, F.R.S., F.L.S., 



Emeritus Professor of Biology, University of Sydney. (Plates 



17 & 18, and 2 Text-figures.) 217 



IV. Spolia RrNiANA. — IV. Notes on the Abundance of some Common 



Marine Animals and a preliminary Quantitative Survey of their 

 Occurrence. By W. A. Herdman, D.Sc, LL.D., For.Sec.R.S., 

 F.L.S., Professor of Oceanography in the University of 

 Liverpool. (With 8 Text-figures.) r . 247 



S**"'' 1 --- 



LONDON 



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, APR 231 



SOLD AT THE SOCIETY'S APARTMENTS, BURLINGTON HOttSE, 



PICCADILLY, W. 1, X« -.^ , 



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WILLIAMS AND NORGATE. 

 1920 



