12 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I25 



The type, U.S.N.M, No. 561597, comes from the Pliocene deposit 

 at North St. Petersburg, Fla. It has lost the nucleus and about 3 of 

 the postnuclear whorls ; the 9 remaining measure : Length 6.8 mm. ; 

 diameter 1.9 mm. U.S.N.M. No. 561598 contains a young specimen 

 from the same source which has the nucleus and 8.5 postnuclear 

 whorls and measures: Length 5.2 mm.; diameter 1.4 mm. U.S.N.M. 

 No. 561599 contains two additional specimens (Collectors' No. 2787) 

 from the same source. In addition to these, 3 lots, 5 specimens, are 

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



LOCKLINIA PLIOCENA, new species 

 Plate 2, figure 3 



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

 of about 2 whorls, which are well rounded, helicoid, and have their 

 axis almost at right angles to that of the succeeding turns, in the first 

 of which they are about one-half immersed. The postnuclear whorls 

 are flattened and polished and marked by lines of growth only. Suture 

 moderately well impressed. Periphery well rounded. Base hemi- 

 spherical, without sculpture. Aperture oval, parietal wall covered by 

 a thin callus ; columella with two folds, the posterior of which is at 

 the insertion of the columella and is much stronger than the anterior 

 which is also much more oblique; the outer lip bears three spiral 

 lamellae on its inside. 



The type, U.S.N.M. No. 561600 (Collectors' No. 2565 A) is a 

 perfect specimen and comes from the Pliocene deposits of North St. 

 Petersburg, Fla. It has 9 postnuclear whorls and measures : Length 

 4.8 mm., diameter i.i mm. U.S.N.M. No. 561601 (Collectors' No. 

 2571) is another specimen from the same source, showing the internal 

 lamination of the outer lip. 



LOCKLINIA ORNATA, new species 



Plate 2, figure 7 



Shell elongate-conic, small, cream-yellow. Nuclear whorls about 

 2^, strongly rounded, forming a depressed helicoid spire, whose axis 

 is at right angles to that of the postnuclear whorls, in the first of 

 which they are about one-half immersed. The postnuclear whorls have 

 a low depressed cord or thickening at the summit which extends over 

 about one-fourth of the width of the turns. Anterior to this cord the 

 whorls are slightly rounded ; they are marked by fine lines of growth 

 and spiral striations. Suture moderately well impressed. Periphery 

 obsoletely angulated. Base hemispherical, marked like the spire. 



