186 Mr. J. Cordeaux on the Heligoland 



Rallus aquaticus, Linnaeus. 



A few in March and April, and again in September, Octo- 

 ber, and November, and occasionally later. Probably not 

 more than a score, Mr. Gatkc says, could be captured in any 

 one year on the island. 



Crex pratensis, Bechstein. 



In April and May, also middle of August and September ; 

 weather warm ; pretty common, although never in gi'eat 

 numbers. 



Crex porzana (Linnaeus) . 



In May when warm ; occasionally in September. Not half 

 a score in a year, but three fourths of these in May. 



Crex bailloni (Vieillot) . 

 Only once, a fine male. 



Crex pusilla (Gmelin). 



Only once, a female, April 22nd, 1854. Mr. Gatkc says, 

 a few times the little Gallinules have been seen ; but without 

 capturing it, the species cannot be determined. 



Gallinula chloropus (Linnaeus). 



Occasionally occurs as a migrant in April and May when 

 the weather is warm, also from the end of August to the 15 th 

 of September, — so few, however, that Mr. Gatke says you 

 cannot count on three in each successive year. 



FuLiCA atra, Liimaeus. 



Obtained about once a year, sometimes in spring, some- 

 times autumn, and even in the depth of winter. 



SOMATERIA MOLLISSIMA (Liunseus) . 



Frequently seen oif the island. On the 19th of September, 

 when some miles to the north of Heligoland, twelve male 

 Eiders, all in line, passed the cutter, flying towards the head- 

 land. 



SoMATERiA stelleri (Pallas) . 



Has occurred three or four times ; all birds of the year. 



Alca torda, Linnaeus, and Uria troile (Linnaeus). 

 Both nest in some numbers on the cliffs. Shooting is per- 



