1917.] 



NATURAL SCIENCES OF PHILADELPHIA. 



313 



whorls slightly convex, having varix-lines on both sides, the last 

 whorl having a short keel below, characteristic of the genus. 



Length 4.3, diam. 1.3, length of aperture 1.4 mm.; 9 whorls. 



This species will be figured in connection with material on Subularia 

 in the next paper of this series. 



V. THE PYRAMIDELLIDiE. 



Further species of this family are to follow when illustrations can 

 be prepared. 

 Turbonilla (Chemnitzia) obleotamentum n. ^p. Fig. 8. 



Haleiwa. Oahu. Type Xo. 116543, A. N. S. P., coll. ])y H. A. 

 Pilsbr} , 1913. Also Haena, Kauai, W. A. and E. L. Bryan. 



The shell is turrited, diameter contained slightly less than three 

 times in the length. Nuclear shell of at least two whorls, tilted 

 towards its spire which is low and half immersed. First post-nuclear 

 whorl having vertical ribs, the rest moderately convex, with sculpture 



is 



H 



^ 

 s 





■'•^ f 



Fig. 7. — Turbonilla kauaiensis. 



Fig. 8. — Turhonilla obledamentum. 



of rather large, rounded, protractive ribs, about 17 on the last whorl, 

 parted by intervals slightly wider than the ribs. On the last Avhorl 

 the concave intervals stop abruptly at the periphery; yet very slight 

 continuations of the ribs, or part of them, are visible on the base. 

 The suture is deeply impressed, almost channelled. The aperture 

 is ovate, the columella thick, barely perceptibly sinuous, almost 

 straight. 



