56 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



Corbula harrisi, new species 

 Plate 4, figure 6 



Shell small, thick, subtrigonal, with beak central, slightly 

 prosogyrate; anterior dorsal slope slightly steeper than the 

 moderately steep posterior dorsal slope ; base broadly rounded ; 

 posterior end sharply rounded ; a faint umbonal slope extend- 

 ing to the point between the posterior end and the base ; shell 

 decorated by faint radial ribbing which is strongest at posterior 

 end along the umbonal slope and by concentric growth lines. 

 Interior of shell is unknown and hence generic reference is 

 doubtful. This species is not so thick as C. parilis Gabb and 

 its concentric ribbing is not so strong. 



Dimensions : — Length, 6mm. ; height, 4mm. ; convexity, 

 1.5mm. 



Type : — No. 275, Cal. Acad. Sci. Locality 244, Tejon Quad- 

 rangle, Kern County, California. Tejon group. In east bank 

 of Live Oak Creek about three-quarters of a mile from its 

 mouth. Coll., B. Martin. 



Named in honor of Professor G. D. Harris of Cornell Uni- 

 versity. 



Corbula uvasana, new species 



Plate 4, figure 7 



Shell small, inflated with central beak, anterior dorsal mar- 

 gin slightly concave with moderate slope to a subtruncate an- 

 terior end ; posterior dorsal margin with slight slope to a 

 broadly rounded posterior; ventral margin broadly rounded. 

 Faint radial lines and feeble concentric growth lines decorate 

 this shell. Interior unknown. 



Dimensions : — Length, 7mm. ; height, 5mm. ; convexity, 

 2mm. 



Type : — No. 276, Cal. Acad. Sci. Locality 244, Tejon Quad- 

 rangle, Kern County, California. Tejon group. In bank of 

 Live Oak Creek about three-quarters of a mile from its mouth. 

 Coll., Bruce Martin. 



Named for its occurrence near Canada de las Uvas, 



