THE 
HYRIA.—Puate V. 
ducto, margine antico infrd alam excavato ; wm- 
bonibus tumidis, angulatis. 
winged Hyria. Shell obliquely subtrigonal, 
smooth, olive brown, iridescent, tumid, elevated, 
rather short; posterior side wide, with an elevated 
angle, bifurcate, dorsal wing compressed, wide, 
much elevated towards the end, ventral margin 
rounded ; anterior side rather short, narrow, with 
the dorsal wing acuminately produced, anterior 
margin excavated below the wing; umboes tumid, 
angular. 
Sowerby. 
Hab, Guayana. 
Tumid and angular, like Hyria syrmatophora, but 
obliquely curved, and having an elevated posterior 
wing like Hyria avicularis. It is much deeper from 
| apex to ventral margin than that species. 


