SM ALLEY: PACIFIC EIDER IN BRITISH WATERS. 75 



" reversion " or what is known amongst breeders of 

 pedigree stock as a "throw back" to some previous 

 ancestor, the ancestor in this particular case being- probably 

 some common type of Eider from which all present-day 

 species originally sprang, and if this theory be correct we 

 shall find the V-mark probably only in isolated cases. 



In conclusion I must return my very grateful thanks to 

 Mr. Saunders, Dr. Sharpe, Mr. Stubbs, Dr. Hartert and 

 Mr. Bonhote for rendering me every assistance in their 

 power ; and I trust our joint labours have not been in 

 vain. 



