to the Cape Verde Islands. 



93 



had obtained them from the holes of a rock out at sea and along 

 the coast. We also noticed a few individuals, on our way to 

 Rombos Islands, flying over the water ; but, to our surprise, 

 none inhabited the rocks of these islands. They appear to 

 confine their habitat to the Brava coast. We met with this 

 species again on Raza, where it is much more numerous. 

 Both sexes are very similar in plumage to P. kuhli, but the 

 crown and neck are much darker and of a deep sooty grey, 

 The dimensions are also very much less, the bill especially 

 being conspicuously shorter and much more slender. 



Four sijeeimens were obtained on Brava. 



18. RiSSA TRIDACTYLA. 



On March 4th and five following days a pair of Kittiwakes 

 frequented the harbour, and were the only Gulls met with. 



19. SULA FIBER. 



Owing to the proximity of their breeding-station on 

 Rombos Islands, Gannets, singly or in pairs, were con- 

 stantly to be seen hanging al)out the coast in search of 

 food, while it was not uncommon to catch sight of flocks 

 of from 15 to 20 beating over the smooth sea in a compact 

 wedge-shaped body ; sometimes skimming over the surface 

 in graceful and steady flight, sometimes rising high in the 

 air — mere specks in the sky — as they prepared to pass over 



