142 BRITISH BIRDS. 



III. — Three eggs. June 27th, first egg hatched. 



June 28th, second egg hatched. 



June 29th, third egg hatched. 

 IV. — Two eggs. June 29th, first egg hatched, 



June 30th, second egg hatched. 



Hatching of S. fluviatilis. 



I. — Two eggs. June 24th, first egg hatched. 



June 25th, no change. 



June 26th, second egg hatched. 

 II. — Three eggs. June 25th, first egg hatched. 



June 26th, second egg hatched. 



June 27th, third egg hatched. 

 III. — Two eggs. June 26th, first egg hatched 



June 27th, second egg hatched. 

 IV. — Three eggs. June 27th, first egg hatched. 



June 28th, second egg hatched. 



June 29th, no change. 



June 30th, third egg hatched. 

 V. — Three eggs. June 27th, first egg hatched. 



June 28th, second egg hatched. 



June 29th, no change. 



June 30th, no change. 



July 1st, third egg hatched. 

 VI. — Three eggs. June 28th, first egg hatched. 



June 29th, second egg hatched. 



June 30th, no change. 



July 1st, third egg hatched. 



Laying of S. fluviatilis. 



VII. — June 25th. A bird was watched back on to a single egg. 

 On June 26th the nest contained the single egg at 10 a.m., 

 but a second had been deposited by 1.30 p.m. 

 VIII. — Bird watched back on to single egg on June 27th. No change 

 on 28th. A second was laid on June 29th. 

 IX. — Bird watched back on to single egg on June 28th. No change 

 on 29th. Nest contained a second egg on June 30th. 

 X. — Watched bird back on to single egg on June 28th and again 

 watched it incubating on single egg, June 29th. A 

 second egg laid on June 30th. 

 XL — Contained one egg on June 22nd. Two on June 23rd. On 

 June 24th it still contained two eggs, but more material 

 had been added to the nest. June 25th, a third egg 

 laid. 



Though hundreds of clutches were seen hatching off, no single instance 

 was noted of the eggs in a nest hatching at the same time. 



Hatching of S. cantiaca. 



I. — Two eggs. June 25th, first egg hatched. No change until 

 June 28th, when the second hatched. 

 II. — Two eggs. Jvme 26th, first egg hatched. No change until 

 June 29th, when the second hatched. 

 III. — Two eggs. June 24th, first egg hatched. No change until 



Jime 26th, when the second hatched. 

 IV. — Two eggs. June 26th, first egg hatched. No change until 

 June 28th, when the second hatched. 



