NO. 2 PYRAMIDELLID MOLLUSKS — BARTSCH 25 



rower than the ribs, the gouged-out portion terminating at the periph- 

 ery like the ribs. Suture well impressed, rendered wavy by the sum- 

 mit of the axial ribs. Periphery well rounded. Base short, well 

 rounded, smooth. Aperture obliquely subquadrate; columella slender, 

 with a weak fold ; outer lip thin. 



The type, U.S.N.M. No. 561622, comes from the Pliocene beds of 

 North St. Petersburg, Fla. It is a broken specimen. The nucleus 

 and 8 postnuclear whorls measure : Length 4 mm., diameter i.i mm. ; 

 the basal half has 4 whorls and measures : Length 3.4 mm., di- 

 ameter 1,3 mm. U.S.N.M. No. 561623 contains an additional speci- 

 men, and two more are in the collection of the A.N.S.P. 



TURBONILLA (CHEMNITZU) ANTAEUSI, new species 

 Plate 4, figure 6 



Shell elongate-turrited, very small, slender, nuclear whorls about 2, 

 strongly rounded, forming a moderately elevated spire whose axis 

 is at right angles to that of the succeeding turns, in the first of which 

 it is about one-third immersed. The postnuclear whorls are flattened 

 and crossed by strong vertical axial ribs, which terminate at the pe- 

 riphery. Of these ribs 14 are present on the last whorl of the type; 

 they are of equal strength from the summit to the periphery. The 

 intercostal spaces are about as broad as the ribs and are strongly 

 gouged out and also terminate at the periphery. The suture is well 

 impressed and rendered wavy by the summit of the ribs. Periphery 

 well rounded. Base hemispherical, smooth. Aperture rather large, 

 subovate ; columella and outer lip slender. 



The type, U.S.N.M. No. 561624, comes from the PHocene deposits 

 of North St. Petersburg, Fla. It is a complete specimen, having 'j.j 

 postnuclear whorls and measures : Length 3.5 mm., diameter 9 mm. 



TURBONILLA (CHEMNITZIA) TERRA, new species 



Plate 4, figure 3 



Shell elongate-turrited, small, rather stout, pale cream-colored. 

 The nucleus consists of about 2.5 whorls that form a moderately 

 elevated helicoid spire, whose axis is at right angles to that of the 

 postnuclear turns, in the first of which the nucleus is about two-fifths 

 immersed. The postnuclear whorls are flattened and crossed by strong 

 vertical axial ribs, which are of equal strength from the summit to 

 the periphery, where they terminate. These ribs are less strong and 

 more numerous on the last whorl, which shows 18, while the anti- 



