NO. 2 PYRAMIDELLID MOLLUSKS BARTSCH 23 



vertical axial ribs that extend equally strong from the summit to the 

 periphery, where they terminate. Of these ribs 19 are present upon 

 the last whorl of the type. The intercostal spaces are about as wide 

 as the ribs; they are well impressed and terminate at the periphery. 

 The suture is well impressed and rendered slightly wavy by the sum- 

 mit of the axial ribs. The periphery is well rounded. The base is 

 hemispherical, well rounded, smooth. The aperture is obliquely sub- 

 quadrate; the columella is slender and provided with a weak fold 

 near its insertion; the outer lip is thin. 



The type, U.S.N.M. No. 561617, comes from the Pliocene deposits 

 of North St. Petersburg, Fla. It has 10 whorls remaining which 

 measure: Length, 7.2 mm., diameter 2 mm. U.S.N.M. No. 561618 

 contains the young specimen from which the nucleus was described. 

 Two additional specimens are in the collection of the A.N.S.P, 



TURBONILLA (CHEMNITZIA) AUGEASI, new species 

 Plate 3, figure 7 



Shell elongate-turrited, cream-yellow, large. The nucleus and 

 early postnuclear whorls are lost in all the specimens seen. The whorls 

 remaining are flattened and crossed by very strong, protractively 

 slanting, slightly sinuous axial ribs, which pass equally strong from 

 the summit to the periphery, where they terminate. Of these ribs 19 

 are present on the last whorl in the type. The intercostal spaces are 

 deeply gouged and not quite so broad as the ribs and, like these, also 

 terminate at the periphery which is well rounded. The base is short, 

 well rounded, smooth. The aperture is obliquely subquadrate; the 

 columella is slender and provided with a feeble fold near its insertion ; 

 the outer lip is fractured. 



The type, U.S.N.M. No. 561619, comes from the Pliocene beds of 

 North St. Petersburg, Fla. It has 12 whorls remaining and measures : 

 Length 9.7 mm,, diameter 2.3 mm. Two additional specimens are 

 in the collection of the A.N.S.P. 



TURBONILLA (CHEMNITZIA.) EURYTIONI, new species 



Plate 4, figure i 



Shell cylindric, of moderate size, cream-yellow. The nucleus and 

 early postnuclear whorls were lost in all the specimens seen. The 

 remaining turns are decidedly flattened and marked by not very 

 strong vertical axial ribs which become enfeebled on the last whorl 

 on which 24 are present, while the antipenultimate turn shows only 17. 

 These intercostal spaces are moderately deeply gouged out and termi- 



