OBSERVATIONS. 



This is a small species, and the slight irregularity in tiit 

 curvature of the lateral edge, exhibits the unequivocal cha- 

 racters of this genus. 



I am indebted for specimens to the late excellent Mi . 

 Stephen Elliott to whom I shall have frequent occasion to 

 express my obligations in the course of this work : ht* ob- 

 tained them from the coast of East Florida. 



REFERENCE TO THE PLATE. 



Figs. 1, 2, and 3, Lateral, superior and inferior views, enlarged 

 Fig. 4, Superior view , natural size 



?i. se. 



