APPENDIX. 
BLACK-BACKED GULL. 
Larus marinus. 
Mr. Austin Clark tells me that he saw a 
specimen in Hull^ in December, 1895. It prob- 
ably occurs on or near Shagrocks. 
I shall always remember my first visit to 
these rough and shaggy rocks when with my 
friend Philip, I spent several hours exploring 
them. This was at low tide, during the latter 
