19 1 8. J Recently published Ornithological Works. 321 



were then dirty yellowish or dirty white, thiii^ high-legged, 

 with extended thick neck. 



In this case also the high degree of fatness weakened the 

 muscles of the wing, so that they hung down ; in the thin 

 period the wings were pres-^ed against the body and the 

 reiniges directed backward. 



The young Wliite Dodo had a short bill, the older bird a 

 more elongated one. 



In the "Musenm Boymans'^ at Rotterdam there is pre- 

 served a water-colour sketch by Conielis Saftleven, repre- 

 senting the head and neck of an adult male White Dodo in 

 breeding-dress. This has enabled me to settle that the Dodo 

 of Goeimare, in the possession of the Duke of Northumber- 

 land, is an adult male White Dodo, but already losing its 

 breeding characteristics. And as this Dodo has — according 

 to Richard Owen — the same colours as that of the Oxford 

 picture painted by Jan Savery, so this Dodo is most probably 

 also a male White Dodo. 



The White Dodo differs from the Common Dodo also by 

 the long slack remiges. On these grounds I believe the 

 Dodo of Hoefnagel is a young male White Dodo. 



In addition to the two drawings of the female White 

 Dodo by Pieter Withoos, which have long been known, I 

 succeeded in discovering two others by Pieter Holsteyn Sr. 



The third kind of Dodo is the better known Solitaire of 

 Rodriguez [Pezophaps solitarius Gmel.). 



I have endeavoured to point out that these three species 

 of Dodo liave several characters in common, both external 

 and ethological : they form a peculiar group of the Columboe, 

 or Columbiformes, witii reptilian characters. 



The first volume of this account of my studies on the 

 Dodo has already appeared, and can be obtained from the 

 booksellers ; and I am hoping to issue a second volume, for 

 the publication of which I have obtained help from the 

 Teyler Fund at Haarlem. This will contain a number of 

 additional facts and discoveries in regard to these very 

 curious and interesting extinct birds. 



