•242« THE VOYAGE OF II.M.S. CHALLENGER. 



Such being the nature of the material at my disposal, it will be seen that, taking into 

 consideration the gap which existed between the eggs in which the blastoderm had but 

 just made its appearance, and those in which the contained embryos had almost arrived 

 at maturity, it was impossible for me to draw up a complete account of the development 

 of the Spheniscidse such as I originally proposed. 



I therefore abandoned the attempt and devoted attention to the skeleton of the 

 embryos, in the hope that I might thereby be able to throw some light on the develop- 

 ment of those skeletal features which are peculiar to the group. In this also I was 

 unsuccessful, as I soon found that even in the youngest of the specimens at my disposal 

 the skeleton was too far advanced to be of any service in this direction. MM. Gervais 

 and Alix,^ in their memoir so often quoted, have figured the bones of a young specimen 

 of Eudyptes, and with these figures the skeletons of the specimens which I have examined 

 agree. I have therefore been able so far to corroborate the observations of these 

 anatomists, but the want of suitable material has prevented me from extending them by 

 working out more fully the development of the group, as I originally intended. 



' Osteologie et Myologie des Manchots. 

 ,JcN'E 18, 1883. 



