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THE JOURNAL 



OP 



THE LINNEAN SOCIETY. 



Vol. XV. ZOOLOGY. No. 81. 



CONTENTS. 



Page 



I. Anniversary Address of the President, Prof. Allman, 

 M.D., LL.D., E.R.S. — Some Eecent Additions to our 

 Knowledge of the Structure of the Marine Polyzoa... 1 



II. On the Thorax of the Blow-fly {Musca vomitoria). By 



Arthur Hammond, E.L.S. (Plates I. & II.) 9 



III. Instincts and Emotions in Eish. By Erancis Day, 



E.L.S 31 



IV. On the Extinct Land-Tortoises of Mauritius and Rodri- 

 guez. By Alpred C. H addon, B.A., Scholar of 

 Christ's College, and Curator in the Museum of Zoo- 

 logy and Comparative Anatomy of the University of 

 Cambridge. (Communicated by Prof. A. Newton, 

 F.R.S.) (Abstract.) ... 58 



V. On a small Collection of Crustacea made by Edward 

 "Whymper, Esq., chiefly in the N. Greenland Seas ; with 

 an Appendix on additional Species collected by the 

 late British Arctic Expedition. By Edward J. Miers, 



E.L.S. &c m 



LONDON: 



SOLD AT THE SOCIETY'S APARTMENTS, BURLINGTON HOUSE 



AND BY 



LONGMANS, GREEN, READER, AND DYER, 



AND 



WILLIAMS AND NORGATE. 

 1880. 



