426 THE ZOOLOGIST. 



evidence on April 26th. I saw no birds on the grassy ledges 

 where they nest, though some may have been in the holes ; 

 there were, however, a party of eleven on the water. 



Black- throated Diver.— On April 21st, off Braich Llwyd, 

 at the northern end of Aberffraw Bay, I watched a Black- 

 throated Diver for some time. The bird was in summer dress, 

 with slate-grey head and neck. The black throat and half-collar 

 of white were very conspicuous. The bird gradually drew away 

 further out to sea, but continued feeding so long as I could 

 see it ; its dives at times lasted for about thirty seconds, and 

 it often brought up flat fish from the sandy bottom of the 

 estuary. When one of these was brought to the surface the bird 

 seemed to bite it over and over again as if to break it up before 

 swallowing it. 



Bed-throated Diver. — On the same day, a few miles from 

 the same spot, I saw an adult Bed-throated Diver. It was near 

 enough for me to see, with the aid of my telescope, its slate 

 crown and nape, red throat, and slightly upcurved bill. It was 

 also diving, but did not remain long in sight, for after a time it 

 rose and flew out to sea. 



