238 DUTCH AND ENGLISH BIRDS. 
Genus Mergulus. 
Mergulus alle (Linn). 
An irregular visitor to the coasts of Holland; chiefly 
by stormy weather. 
Also an irregular visitor to the British coasts, but 
sometimes occurring in large numbers. 
Genus Fratercula. 
Fratercula arctica (Linn.). 
Of irregular occurrence as a straggler on the coasts of 
Holland. 
Breeds in large numbers on the British coasts, migrating 
southwards in winter. 
Part e. 
TABLE OF DUTCH BIRDS. 
Summer Winter Occasional 
Residents. visitors. visitors. visitors. Total. 
I. Passeres 23 47 18 31 119 
II. Picariae 5 5 — + 13 
III. Striges — — 2 7 
IV. Accipitres 4 5 5 10 24 
V. Steganopodes 1 -- — 2 3 
VI. Herodiones 1 6 — 5 12 
VII. Anseres 4 4 21 8 37 
VIII. Columbae 1 2 a = 3 
IX. Pterocletes — — a it 1 
X. Gallinae 3 1 — — 4 
XI. Fulicariae 3 3 — 1 7 
XII. Alectorides -- a — 4 4 
XIII. Hemipodii -— — — — — 
XIV. Limicolae f 17 15 7 40 
XV. Gaviae 5 3 10 22 
XVI. Tubinares — — — 5 5 
XVII. Pygopodes 1 2 6 5 14 
Notes froin the Leyden Museum, Vol. XV. 
