50 



A. von Pelzeln on Birds in 



the white meets with the dark, the colour on the sides of the 

 neck and the breast is more greyish than on the back. 



&.I. 



Puffimis tenebrosus. 



" Fifth and second primaries of equal length ; from the end 

 of the first to the last secondaries 2" 8"' (?) . 



Puffinus obscurus. 



" Length 11"; wing 7" &", middle rectrices 3", the outer 7|'" 

 shorter ; bill 1" 3V", from the nostrils 9%'", from the front 1"; 



