36 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I25 



The rounded whorls and spiral sculpture easily distinguish this 

 species from the rest of the Mormulas, having retractively slanting 

 ribs. 



I take pleasure in naming this species for Mrs. Margaret C. Teskey, 

 the able secretary-treasurer of the American Malacological Union. 



Genus BARTSCHELLA Iredale 



1916. Bartschella Iredale, Proc. Malac. Soc. London, vol. 12, p. 36 (type: 



Dunkeria suhangtilata Carpenter). 

 1909. Dunkeria Dall and Bartsch, U. S. Nat. Mus. Bull. 68, p. 120 (type: 



Dunkeria subangulata Carpenter) (not Dunkeria Carpenter, 1856= 



Dunkeria Dall and Bartsch, 1904, Proc. Biol. Soc. Washington, vol. 17, 



p. 8; type: D. paucilirata Carpenter). 



Pyramidellids having strongly rounded whorls, which are shoul- 

 dered at the summit and marked by strong axial ribs and spiral cords 

 whose junction is subnodulose. 



Type: Turbonilla (Bartschella) subangulata Carpenter. 



BARTSCHELLA PARKERI, new species 



Plate 6, figures 4a, b 



Shell turrited, shouldered at the summit, cream-yellow. The nu- 

 cleus consists of about 2 well-rounded whorls, which form a low 

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

 whorls, in the first of which the nucleus is about one-fourth immersed. 

 The postnuclear whorls are almost flattened and shouldered at the 

 summit. They are marked by very strong axial ribs, of which 16 are 

 present upon the second and third, 18 upon the fourth, 20 upon the 

 fifth, and 22 upon the last whorl. These ribs are very strong at the 

 summit where they render the suture decidedly sinuous. The inter- 

 costal spaces are about as wide as the ribs. The spiral sculpture be- 

 tween the sutures consists of six subequal cords, of which the first 

 is on the shoulder at the summit ; this and the second are about half 

 as wide as the third, which forms the anterior angle of the shoulder; 

 the other three cords are of equal size and spacing and occupy the 

 anterior half of the whorls. The junction of the axial ribs and spiral 

 cords form feeble nodules. Suture strongly marked. The periphery 

 of the last whorl is marked by a spiral cord which equals the third 

 in width, that is, it is about twice as wide as its neighbor. Base short, 

 well rounded, marked by the feeble continuations of the axial ribs 

 and six incised spiral lines. The aperture is ovate; the columella is 

 short, stout, and bears a prominent fold at its insertion; the parietal 

 wall bears a thin callus; the outer lip is fractured. 



