Godwin-Austen, Lieut.-Colonel H. H, F.R.S., F.L.S. 



On the Land-Molluscan Genus Durgella, W. T. Blanford ; with 

 Notes on its Anatomy and Description of a new Species. 



(Plates XX. & XXI.) 291 



Haddon, Alfred C, B.A., Scholar Christ's Coll., and Curator Mns. 

 Zool. and Comp. Anat., University of Camhridge. 



On the Extinct Land-Tortoises of Mauritius and Rodriguez. 

 (Communicated by Prof. A. Newton, F.R.S.) (Abstract.) 58 

 Hammond, Arthur, F.L.S. 



On the Thorax of the Blow-fly (Musca vomitoria). (Plates I. & 



IT.) 9 



Herdman, W. A., D.Sc, F.R.S. Edinb., F.L.S., Demonstrator of 

 Zoology, University of Edinburgh. 



Notes on British Tunicata, with Descriptions of new Species. 



I. Ascidiidse. (Plates XIV.-XIX. and 3 woodcuts.) 274 



On Individual Variation in the Branchial Sac of Simple Ascidians 329 

 Lankester, E. Ray, M.A., F.R.S., F.L.S., Professor of Zoology and 

 Comparative Anatomy in University College, London. 



On the Tusks of the Fossil Walrus foimd in the Red Crag of 



Suffolk.. (Abstract.) 144 



Lubbock, Sir John, Bart., M.P., D.C.L., LL.D., F.R.S., F.L.S., 

 Vice-Chancellor of the University of London. 

 Observations on the Habits of Ants, Bees, and Wasps : — 



Part VII. Ants. (Plate VHI. and 5 woodcuts.) 167 



Part VIII. Ants. (With 5 woodcuts.) 362 



Macdonald, Dr. John Dennis, F.R.S., Inspector-General R.N. 

 On the Natural Classification of Gasteropoda. Part I. (Com- 

 municated by Dr. G. E. Dobson, F.L.S.) 161 



Part II. (Communicated by Dr. G. E. Dobson, F.L.S.) .... 241 

 Michael, Albert D., F.L.S., F.R.M.S. 



Observations on the Life-histories of Gamasince, with a view 

 to assist in more exact Classification. (Plates XXII. & 

 XXIII.) 297 



Miers, Edward J., F.L.S., F.Z.S., Assistant in the Zoological 

 Department of the British Museum. 



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 Expe- 

 dition 59 



Notice of Crustaceans collected by P. Geddes, Esq., at Vera Cruz 85 



