vi (JONTENTS. 



Page 

 On the Present Position of the Chemistry of the Gums. By H. H. Robin- 

 son, M.A., F.C.S., F.I.C 227 



The Present Position of the Chemistry of Rubber. By S. S. Pickles, M.Sc. . . 233 



The Study of Hydro-Aromatic Substances. — Report of the Committee, con- 

 sisting of Dr. E. Divers (Chairman), Professor A. "W. Orosslet (Secretary), 

 Professor W. H. Peekik, Dr. M. 0. Forster, and Dr. H. R. Le Sueur'... 257 



Recent Work on Hydro- Aromatic Substances. By Professor A. W. 

 Crosslet 260 



The Hydrolysis of Sugars. By Robert J. Caldwell, B.Sc 267 



The Faunal Succession in the Carboniferous Limestone of the South-west of 

 England. — Interim Report of the Committee, consisting of Professor J. W. 

 Gregory (Chairman), Dr. A. Vaughan (Secretary), Dr. Wheeltox Hind, 

 and Professor W. W. Watts, appointed to enable Dr. A. "N'aughan to con- 

 tinue his Researches thereon 292 



Investigation of the Fauna and Flora of the Trias of the British Isles. — Fourth 

 Report of the Committee, consisting of Professor W. A. Herdman (Chair- 

 man), Mr. J. LoMAS (Secretary), Professor W. W. Watts, Professor P. F. 

 Kendall, and Messrs. H. C. Beaslet, E. T. Newton, A. C. Seward, and 

 W. A. E. UssiiER. (Drawn up by the Secretary.) 293 



Ou Tthynchosaufus articeps (Owen). By A. Smith Woodward, 



LL.D.,F.R.S 293 



Report on Footprints from the Trias. Part IV. By H. C. Beasley ... 299 



Composition and Origin of the Crystalline Rocks of Anglesey.— Report of the 

 Committee, consisting of Mr. A. Harker (Chairman), Mr. E. Greenly 

 (Secretary), Mr. J. Lomas, and Dr. C. A. Matley, appointed to enable Mr. E. 

 Greenly to complete his Researches thereon 301 



Life-zones in the British Carboniferous Rocks. — Interim Report of the Com- 

 mittee, consisting of Dr. J. E. Marr (Chairman), Dr. Wheelton Hind 

 (Secretary), Dr. F. A. Bather, Mr. G. C. Crick, Dr. A. H. Fooed, Mr. H. 

 Fox, Professor E. J. Garwood, Dr. G. J. Hinde, Professor P. F, Kendall, 

 Mr. R. Kidston, Mr. G. W. Lamplugh, Professor G. A. Lebour, Mr. B.N. 

 Peach, Mr. A. Strahan, Dr. A. Vaughan, and Dr. II. Woodward. 

 (Drawn up by the Secretary.) 302 



Investigation of the Fossiliferous Drift Deposits at Kirmington, Lincolnshire, 

 and at various localities in the East Riding of Yorkshire. — Report of the 

 Committee, consisting of Mr. G. W. Lajiplugh (Chairman), Mr. J. W. 

 Stather (Secretary), Dr. Tempest Anderson, Professor J. W. Carr, Rev. 

 W. Lower Carter, Mr. A. R. Dwereyhousb, Mr. F. W. Harmer, Mr. J. H. 

 Howarth, Rev. W. Johnson, Professor P. F. Kendall, Mr. H. B. Muff, 

 Mr. E. T. Newton, Mr. Clement Reid, and Mr. Thomas Sheppard 313 



Index Generum et Specierum Animalium. — Report of the Committee, consist- 

 ing of Dr. Henry Woodward (Chairman), Dr. F. A. Bather (Secretary), 

 Dr. P. L. Sclater, Rev. T. R. R. Stbbbing, Dr. W. E. Hoyle, Hon. 

 Walter Rothschild, and Lord Walsingham 314 



The Probability of Anlcylostoma becoming a Permanent Inhabitant of our 

 Coal Mines in the event of its introduction. — Report of the Committee, 

 consisting of Mr. A. E. Shipley (Chairman), Mr. G. P. Bidder (Secre- 

 tary), and Mr. G. H. F. Nuttall 315 



The Zoology of the Sandwich Islands. — Sixteenth Report of the Committee, 

 consisting of Professor Newton (Chairman), Mr. David Sharp (Secretary), 

 Professor S. J. Hickson, Dr. P. L. Sclater, Dr. F. Du Cane Godman, and 

 Mr. Edgar A. Smith 315 



Melanism in Yorkshire Lepidoptera. By G. T. Poebitt, F.L.S 316 



