Bulletin of the Museum of Comparative Zoology 

 AT HARVARD COLLEGE. 



Vol. XXIV. No. 5. 



THE DEVELOPMENT OF THE SCALES OF 

 LEFIUOSTEUS. 



Bt W. S. Nickerson. 



With Four Plates. 



CAMBRIDGE, U. S. A. : 



PRINTED FOR THE MUSEUM. 



July, 1893. 



