RAZORBILL. 



379 



verse stripe, has only two instead of three transverse grooves which 

 characterize that of the old bird. Young in down have the forehead and 

 underparts greyish white, and the rest of the upper parts brownish black. 

 When they are about half-grown they assume a plumage which is half 

 down and half feathers, and scarcely differs in colour from that of the 

 adults in summer. 



RAZORBILLS IN THE TANKS AT THE ZOO. 



2c 2 



