XVII. THE PTEROB1UNCHIA OF THE SCOTTISH 

 NATIONAL ANTARCTIC EXPEDITION. 



I'.v S. V. HARM Kit, Sc.l)., F.R.S., Keeper of tin.- I >.'p;ir! incut ,,f /nnl..jry in tin- F.ritisli 

 Museum; ;ind \V. (1. I! 1 1>K\Y< K )| ), D.Sc., Lectim>.r <m lli.,],^}- in the Al.-.lir.-il 

 School of St, M,-ir\'s Hospital, University of London. 



(WITH /<vr/; TKXT FIGURES AND TWO I-I.ATKS.) 



