EAST COAST MARINE SHELLS 



21 



or four one-hundre 

 plates of drawings 

 Ball's Bulletin 37 

 Museum, the figure 

 wise the magnlfica 

 shown on the plate 

 The length 

 appearing on Plate 

 many cases by a li 

 length to the over 



dths of an 

 60-73, 



of the U. 

 s are life 

 tion or re 



itself. 



or width o 

 s 1 to 59 1 

 ne, corresp 

 -all dimens 



inch. In the 

 derived from 

 S. National 



size, other- 

 duction is 



f specimens, 

 s indicated in 

 onding in 

 ion of the 



shell. The presence of a line indicates 

 that the illustration is enlarged. The ab- 

 sence of a line indicates that the figure 

 is approximately natural size or else re- 

 duced. 



The term "Fig." together with a 

 niameral and no plate number indicates a 

 reference to a figure in the text and not 

 upon a plate. 



