470 PROCEEDINGS OF THE ACADEMY OF [July, 



characterized by a conspicuous circular reinforced aperture, a pro- 

 found umbilicus, and an elevated cancellate spire. Besides the 

 Coon Creek species two others are known, an undescribed species 

 from Eufaula, Alabama, and a species described by Miiller in 1851 

 from Aachen beds of Vaals, Germany, and referred to the genus 

 Scalaria. The same species was referred to Liotia by Holzapfel in 

 1888. 12 This genus differs from typical Liotice which occur in the 

 Coon Creek strata in having a more elevated spire, a circular rein- 

 forced aperture and further by a profound umbilicus. In general 

 outline there is some resemblance to Delphinula, but Delphinula has 

 a nacreous interior and an aperture which is not reinforced or circular. 



Urceolabrum tuberculatum *p nov. PI. XXIV, figs. (3 and 7. 



Description. — Shell small, solid, porcellanous and ornately sculp- 

 tured; spire elevated and acute; protoconch scar small; whorls 

 circular in cross-section and four in number; external ornamentation 

 elaborate, axials dominant, costae 14 in number on penult equally 

 spaced and evanescing on base of the body ; spirals forming 5 rows of 

 tubercles at intersection with costae on body whorl, interspiral space 

 at base of body rather wide, an isolated row of tubercles on anterior 

 margin of the umbilicus; suture impressed and crenate; aperture 

 circular, peristome heavily reinforced and calloused resembling 

 mouth of a jug, rim of aperture half as wide as opening; umbilicus 

 profound and funicular. 



Dimensions. — Altitude, 5 mm.; width of aperture, 1 mm.; maximum 

 diameter of body. 3.4 mm.; apical angle, 60°. 



This elegant little species is hard and well preserved, being rather 

 common in the Coon Creek sediments. It may be separated from the 

 Eufaula species by the fact that the Eufaula form has fine secondary 

 lirse between the primary spirals and on the band at the base of the 

 body whorl. It differs from the German species of this genus 13 in 

 having sharper axials and tubercles at intersection of costae and 

 spirals; the German form has radial lines on the reinforced aperture, 

 while aperture of the Tennessee form is smooth. 



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

 Creek, McNairy County, Tennessee. 



12 Holzapfel, E., 1888, Palaeoulographica. Band XXXIY, p. 170, Tai. xviii, 

 figs. 3-7. 



13 Holzapfel, E., 1>>>>s. Inc. cit. 



