NO. 2 PYRAMIDELLID MOLLUSKS — BARTSCH 1/ 



Genus UGARTEA Bartsch 



1917. Ugartea Bartsch, Proc. U. S. Nat. Mus., vol. 52, p. 662. 



Shell elongate-turrited with a fold on the columella and another 

 on the parietal wall ; the whorls are marked by axial ribs. 

 Type: Turbonilla (Ugartea) juani Bartsch. 



UGARTEA LOCKLINI, new species 

 Plate 2, figure 4 



Shell elongate-turrited, cream-yellow. The nucleus consists of 

 about 2.3 well-rounded whorls that form a depressed helicoid spire 

 whose axis is at right angles to that of the postnuclear turns, in the 

 first of which the nucleus is about one- fourth immersed. The post- 

 nuclear whorls are slightly rounded and marked by strong, slightly 

 retractively slanting axial ribs, which are separated by spaces about 

 as wide as the ribs. Of these ribs ii of equal strength are present on 

 the posterior seven-eighths of the last whorl in the type and 6 more 

 closely spaced and enfeebled on the last eighth. The penultimate 

 whorl in the type shows 12 equally strong ribs. The ribs extend 

 equally strong over the exposed portion of the whorl but weaken after 

 they pass the well-rounded periphery, disappearing on the base shortly 

 after passing this. Suture well impressed. Base rather long, well 

 rounded. Aperture obliquely oval ; parietal wall covered by a strong 

 callus that bears a weak spiral fold a little anterior to its middle; 

 columella with a strong spiral fold at its insertion. The outer lip at 

 intervals bears three spiral folds on its inside. 



The type, U.S.N. M. No. 561605, comes from the PHocene deposit 

 at North St. Petersburg, Fla. It has 6.5 whorls remaining and meas- 

 ures: Length 4.7 mm., diameter 1.2 mm. U.S. N.M. No. 561606 con- 

 tains three topotypes from the same place, one of which has furnished 

 the description of the nucleus. Six additional specimens are in the 

 collection of the A.N.S.P. 



Genus TURBONILLA Risso 



1826. Turbonilla Risso, Histoire naturelle des principales productions de I'Eu- 



rope meridionale, vol. 4, pp. 224, 394. 

 1861. Eiiturbonilla Semper, Arch. Ver. Freunde Naturg. Mecklenburg, vol. 15, 



p. 354 (no type). 

 1861. Eliisa A. Adams, Ann. Mag. Nat. Hist., ser. 3, vol. 7, p. 297 (type: 



Elusa teres A. Adams). 



Shell with sinistral apex, cylindroconic, many whorled, generally 

 slender; with a single columellar fold which varies in strength and 



