Synopsis Fre:sh-Wati;r Mollusca 



77 



Subgenus EURYNIA s. s. 



Shell usually of good size, subelliptical, elongated, more or less pointed 

 bc::uid; beak sculpture double-looped, the posterior loop often open behind. 



Fig. 210 



sa 



mp 



Figf. 211 



Inner edgq of the mantle in the female in front of the branchial open- 

 ing with a long row of quite regular, uniform, subequal papilLx, reaching 

 to about the middle of the lower margin. 



Tvpe : Uv.io recta Lam., fig. 210. « Animal, fig. 211. 



