464 PROCEEDINGS OF THE ACADEMY OF [July, 



collection by many perfect specimens. It is the type of the genus 

 and is named in honor of Dr. L. C. Glenn, Professor of Geology at 

 Vanderbilt University. 



Occurrence. — Ripley Formation: Dave Weeks Place, on Coon 

 Creek, McNairy County, Tennessee. 



Ornopsis elevata sp nov. PI. XXIV, figs. 2 and 3. 



Description. — Shell of medium size, rugose; spire elevated, its 

 altitude approximately the same as the length of the aperture; 

 protoconch broken away; external sculpture dominantly axial, the 

 costse elevated and rounded, highest upon the shoulder, becoming 

 faint toward the anterior, evanescent anteriorly and absent altogether 

 upon the posterior fasciole, about twelve on body whorl, irregularly 

 spaced toward aperture; space between shoulder and posterior 

 suture separated by slightly narrower concave intercostals; spiral 

 sculpture of rather low, crowded lirae separated by deeply impressed 

 lines, about twenty on body whorl; lirae equally as well marked on 

 the summit of the axials as in intercostal spaces; suture line impressed; 

 body whorl smoothly constricted anteriorly into a narrow pillar, 

 posterior part of aperture ovate, but broken anteriorly by a rather 

 long narrow anterior canal; inner lip calloused; columella flattened 

 at the entrance of the canal into a flat shelf-like fold. 



Dimensions. — Altitude, 34.5 mm.; maximum diameter, 17.2 mm.; 

 spiral angle, 44° 51'. 



This species differs from Ornopsis glenni in possessing a higher, 

 more acuminate spire and a less inflated body whorl. 



Occurrence. — Ripley Formation: Dave Weeks Place, on Coon 

 Creek, McNairy County, Tennessee. 



Family BUCCINIDiE. 



Genus HYDROTRIBULUS gen. nov. 



Etymology: udwp, water; t/>:',3»/<>c, burr. 



Type: Hydrotribulus nodosus sp. nov. 



Shell moderately large and solid, top shaped in outline; spire less 

 than half the entire length of the shell; protoconch scar small, sculp- 

 ture vigorous, the axials undulatory, the spirals more sharply defined; 

 aperture pyriform and produced anteriorly into a narrow recurved 

 canal; outer lip expanded and abruptly constricted at the base of 

 the body, dentate within; parietal wall heavily glazed, sometimes 

 bearing a tooth-like process directly in front of the posterior com- 

 missure; inner lip excavated and calloused, reflected anteriorly, con- 



