CONTENTS 



SECTION B -BIOLOGICAL, GEOLOGICAL, & CHKMICAL 



_ SCIENCE 



PAGE 



Bakkett - Hamilton (Captain G. E. H.), B.A., F.Z.S., 

 M.R.I.A. :— 



Abstract of a Physiological Hypothesis to explain the 

 Winter Whitening of Mammals and Birds inhabit- 

 ing Snowy Countries, and the more striking 

 points in the Distribution of White in Vertebrates 

 generally, , 303 



An Addition to the List of British Boreal Mammals, . 315 



Cakpentek (George H.), B.Sc. Lond., M.R.I.A. : — 



- On the Relationships between the Classes of the 



Arthropoda. (Plate VI.), . . . .320 



Cole (Geenville A. J.), M.R.I.A., F.G.S. :— 



The Intrusive Gneiss of Tirerrill and Drumahair, . 361 

 On Composite Gneisses in Boylagh, West Donegal. 



(Plates I.-V.), 203 



Ebrill (Geokge), B.A. : see Ryan (Hugh). 



McArdle (David) : — 



A List of Irish Hepaticse, 387 



McHenry (Alexander), M.R.I.A.: — 



Report on the Ox Mountain Rocks and their probable 

 continuation from Galway and Mayo into Donegal, 

 Tyrone, and Londonderry, . . . . .371 



