VERMIOLOGY; 



PLATE CXXXV. 



ECHINUS SUBDEPRESSUS 

 SUBDEPRESSED ECHINUS 



Verm. Mollusca 



generic character. 



Body roundish, covered with a bony sutured crust, and 

 generally furnished with moveable spires : mouth placed beneath, 

 consisting usually of five valves, 



* Base irregular, with five extended petal-shaped marks on 

 the surface. 



f Margin with angular sinuosities. 



SPECIFIC CHARACTER 

 AND 

 SYNONYMS. - 



Ovate-elliptic : back slightly convex, sides somewhat sinuous, 

 avenues ovate-oblong pulvinate : vent near the margin. 



VOL. IV. M 



