164 
DTP PEP. 
September, they nearly assume the adult plumage, but not 
entirely so until the second change. 
I refer my readers to a demonstrative and most conclusive 
paper by my brother, Beverley R. Morris, Esq., M.D., the 
Editor of ‘The Naturalist,’ vol. i, pages 5 to 11 of that 
periodical, ‘On the power that certain Water-Birds possess of 
remaining partially submerged in deep water.’ 
