.542 



APPENDIX A. 



Sula capensis. 



Sida fterralor. 



Sitla hassana. 



Length, 35 inches. 



Length of bare skin 

 on throat, 3 to 6 inches. 



Crown and nape of 

 neck pale yellow, 

 rather more pronounced 

 than in S. hassana. 



Tail-feathers black. 



When in change of 

 plumage, i.e., at the 

 age of about fifteen 

 months, the dark 

 feathers on the under- 

 parts are lighter, and 

 more freckled than m 

 S. hassana. 



Illustration, " The 

 Fauna of South Africa" 

 Vol. IV., Plate 6. 



Length, 34 inches. 



Length of bare skin 

 on throat 4 to 8 inches. 



Crown and nape of 

 neck yellow, more pro- 

 nounced than in iS. has- 

 sana. 



From four to six of 

 the tail-feathers black. 



Secondary-feathers of 

 the wing blacii. 



Young birds have 

 larger white spots on 

 the wing than in the 

 young of S. hassana, 

 and the breast and 

 belly also turn white 

 sooner. 



Illustration, Gould's 

 " Birds of Aiistralia," 

 Vol. VI., Plate 76. 



Length, 37 inches. 



Length of bare skin 

 on throat 3 to 4 inches. 



Crown and nape of 

 neck pale yellow. 



All the tail-feathers 

 white. 



Young birds described 

 on p. 478. 



Illustration, " Rough 

 Notes on Birds," by 

 E. T. Booth, Vol. III., 

 Plates I.-VI. 



SULA CAPENSIS. 



Sida capensis, Licht. 

 (No synonyms.) 

 The Black-tailed Gannet. 

 Malagash. 



Dutch name : Kaapse Stommerik. For a list of references, 

 see " Catalogue of Birds in the British Museum," XXVI., p. 429. 



The Black tailed Gannet of South Africa must be very abundant 

 along the shores of Cape Colony, but its distribution goes far 

 south of that, for the Antarctic expedition of 1898-1900 met 

 with it in latitude 44° 3'. Northward it travels up the coast to 

 Loango and the French Congo on the west of Africa, and 

 Gannets with black tails, which may have been S. capensis, 

 have even been seen oflE the Canaries (Meade-Waldo, " Ibis," 



