THE CONTRIBUTORS 



J. ARTHUR THOMSON, M.A., Professor of Natural History in 

 the University of Aberdeen. 



W. P. PYCRAFT, F.Z.S., Assistant in Charge of Osteological Col- 

 lections, British Museum (Natural History). 



W. W. WATTS, M.A., M.Sc., F.R.S., Professor of Geology, Royal 

 College of Science, London. 



W. H. LANG, M.B., D.Sc., Professor of Cryptogamic Botany in 

 the University of Manchester. 



A. D. HALL, M.A., Director or the Experimental Station at 

 Rothamsted. 



OSWALD H. LATTER, M.A.(Oxon.), Senior Science Master at 

 Charterhouse School. 



MARION I. NEWBIGIN, D.Sc., Lecturer on Zoology, Edinburgh 

 College of Medicine for Women ; Author of " Life by the 

 Seashore," etc. 



Miss CHARLOTTE L. LAURIE, of Cheltenham Ladies' College ; 

 Author of "Elementary Text-Book ot Botany." 



FRANK CAVERS, D.Sc., F.L.S., Professor of Biology, Hartley 

 University College, Southampton. 



J. E. HENNESEY, B.A., B.Sc., formerly Principal of the Lady 

 Warwick Agricultural School, Author of " The School Garden." 



