MONOGRAPH OP THE PETRELS. 



as having the feet " yellow, passing into black on the anterior portions of the toes with 

 their membranes " ; while, according to Coues, the tarsi are " light-coloured, passing 

 into black on the terminal portion of the toes." 



The figure in the Plate is taken from the specimen in the Cambridge Museum, 

 kindly lent me by Professor Harmer. It should be noted that this example exhibits 

 an extraordinary number of filo-plumes on the head, neck, and mantle. Total length 

 about 13.5 inches ; culmen, 1.15 ; wing, 10.0 ; tarsi, 1.5 ; middle toe and claw, 1.8. 



180 



