74 THE NAUTILUS. 



(Scalenostoma) rangii, Bartsch, Proc. U. S. N. M., No. 1906, p. 

 307, 344, 1912. 



SCALENOSTOMA BABYLONIA (Baitsch). 



Odostomia {Scalenostomn) babylonia Bartsch, Proc. U. S. N. M., 

 No. 1903, pp. 287-8, PI. 38, fig. 3, 1912, Odostomia (Scale- 

 nostoma) babylonia Bartsch, Proc, U. S. N. M., No. 1906, p. 307, 

 344, 1912. 



The South African species of this genus which I described in 

 the Report on the Turton Collection of South African Marine 

 Mollusks, Bull. 91, U. S. N. M., p. 70, PI. 19, fig. 6, 1915, as 

 Subeulima magnifica must now be called Scalenostoma magnifica 

 (Bartsch). 



DESCKIPTION OF A NEW VARIETY OF LAMPSILIS FROM ONEIDA LAKE 

 WITH NOTES ON THE L. LUTEOLA GROUP. 



BY FRANK C. BAKER. 



Lampsilis radiata ONEIDEN8I8 F. C. Baker. Plate II. 



Shell elliptical in outline, rounded at both ends, somewhat 

 compressed ; dorsal margin slightly curved, ventral margin 

 rounded, notably so in the male shell ; female shell produced 

 postbasally ; surface usually roughened by growth lines, rarely 

 smooth ; epidermis olive-green, the posterior half usually black 

 or brown, obscuring the markings ; a few dark green rays of 

 the radiata type are present on some shells ; umbones promi- 

 nent, inflated, but little elevated above the contour of the dorsal 

 margin ; unbonal slopes rounded ; cardinal teeth of the left 

 valve double, rather heavy, serrated, the anterior cardinal higher 

 than the posterior and pyramidal in shape, the posterior cardi- 

 nal rectangular somewhat compressed ; the pit between the 

 cardinal teeth is deep and wide ; there is a small, narrow pit at 

 the base of the anterior cardinal tooth ; cardinal teeth of right 

 valve two in number, triangular, the anterior small, compressed, 

 the posterior large, elevated above the anterior, forming a trun- 

 cated pyramid ; the pit between the teeth is narrow and deep ; 

 the anterior cardinal of this valve is reduced to a mere remnant 

 in some individuals ; the ridge joining the cardinal and lateral, 



