1917. 



NATURAL SCIENCES OF PHILADELPHIA. 



321 



Odostomia (Evalinai haleiwensis n. sp. Fig. 19, 



Haleiwa, Oahu. Type and a smaller specimen No. 116546, A. 

 N. S. P., collected by Pilsbry, 1913. Paumalu, coll. by Mrs. A. F. 

 Letson. 



The shell is imperforate, oblong. The nuclear whorls are de- 

 pressed. Axial sculpture consists of numerous extremely low 

 plications, which become still weaker on the last whorl. These are 

 crossed by fine, impressed spiral lines, of which there are about 10 

 on the penult whorl. The whorls are rather convex, parted by a 

 deeply impressed almost channelled suture. Aperture is ovate. 

 Columellar fold low but distinct, scarcely visible in a direct front 

 view. 



Length 3, diam. 1.05, length of aperture 1 mm.; 5f whorls. 



It is closely related to 0. gracilis Pse., yet much smaller in all its 

 parts, less densely striate spirally, and less attenuated near the 

 summit. 



Odostomia (Evalina> gracilis Pease. Fig. is. 



Odostomia gracilis Pease, Amer. Jom-. of Conch. Vol. Ill, p. 292, PI. 24, fig. 20 

 (Hawaii). 



Pease confused two species under gracilis. His description was 



evidently framed to cover both; but the figure was drawn (very 



badly) from the stouter shell, and I have selected this as the type 

 (fig. 18). It is No. 19967, A. N. S. P. 



The surface is inconspicuously and very weakly plicate, and 

 densely striate .spirally. The lateral outlines are distinctly convex. 

 23 



