Hutton.— On new Tertiary Shells. 323 



convex, the posterior also slightly convex, ventral margin rounded. Left 

 valve with two cardinal teeth, the anterior bifid ; posterior lateral tooth 

 small, the anterior one obsolete. Eight valve (?). 



Length, *58 inch ; height, *46 inch. 



Locality. Wanganui. 



Kellia robusta. 



Shell orbiculo-triangular, nearly as high as long, compressed, nearly 

 equilateral, very delicately regularly concentrically striated. Anterior and 

 posterior dorsal margins nearly straight, sub-equal, the anterior rather the 

 steeper ; ventral margin and both ends rounded. Eight valve with a lateral 

 tooth on each side, both of which are nearly parallel with the margin. 

 Anterior tooth the stronger of the two. 



Length, *12 inch ; height, "11 inch. 



Locality. Petane. 



Kellia effossa. 



Shell oblongo-triangular, nearly equilateral, rather swollen, rather 

 coarsely irregularly concentrically striated. Anterior dorsal margin rather 

 concave, the posterior one rather convex, ventral margin flattened, the two 

 ends rounded. Eight valve with a lateral tooth on each side and a flattened 

 concave portion in the centre ; posterior lateral sharp and nearly parallel to 

 the margin ; the anterior thickened and curved inward forming a deepish 

 pit between it and the dorsal margin. Left valve with a lateral tooth on 

 each side and a cardinal tooth in the centre, sloping backward. 



Length, -13 inch ; breadth, - 1 inch. 



Locality. Petane. 



Loripes concimia. 



Shell small, sub-orbicular, the umbos turned forward, truncated behind, 

 compressed, regularly very finely concentrically grooved. Anterior dorsal 

 margin hollowed under the umbo, then convex ; posterior dorsal margin 

 slightly convex, descending suddenly near the posterior end ; anterior end 

 sometimes slightly undulated ; ventral margin rounded. Lunule lanceolate. 

 Anterior adductor impression elongated. Teeth : right valve one cardinal, 

 the posterior lateral obsolete ; left valve with two diverging cardinals, the 

 laterals obsolete. 



Length, *3 inch ; height, -27 inch. 



Locality. "Wanganui and Petane. 



Mysia ampla. 



Shell sub-orbicular, rather thick, concentrically striated ; posterior 

 dorsal margin slightly concave, the anterior dorsal margin slightly arched. 

 Interior rough, slightly radially striated, the adductor impressions and 

 pallial line well marked. Hinge moderate ; left valve with two diverging 

 cardinal teeth, the anterior of which is grooved ; lateral teeth obsolete, 



