FEATHERS OF PENGUINS. 



much shorter than the rhachis of the definitive feather. This arrangement is somewhat 

 remarkable and demands further explanation. 



PIG. 3. — A DEVELOPING CONTOUR FEATHER OP PygOSCelis odelicB, SHOWING THE MESOPTYLE DOWN-PLUMAGE BORNE IK 

 PART BY THE MAIN SHAFT, AND IN PART BY THE AFTER-SHAFT (a). 



In the first place, the fact that any of the rami of the pre-penna should be found in 

 organic connection with those of the after-shaft of the contour feather is, so far as I 

 know at present, elsewTiere unknown. There can be no doubt, I think, l)ut that the 



