PLATE 246. 



ti*Sl::il^m-''''^'' ''X%'' 



^^f^^Wtti^^^^ ''"'' ■.;«-. 



.'M *'",C-v 















'^S^IilgSSjS,.;;,,,,. , 









— -7^^:^?^ •" 



THE BARN-DOOR SKATE. 



Raia laevis, Mitchill. (p. 667.) 

 Dra^T-ing by H. L. Todd, from No. 21577, U. S. National Mu.seum, collected at Gloucester, Massaclia.,ett8, October, 1878, by V. S. Fish Commis.ion. 



