416 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 47. 



inner lip almost vertical, slightly revolute; parietal wall glazed with a 

 thin callus. 



The type, Cat. No. 252575 U.S.N.M., was dredged at Chincoteague, 

 Virginia. It has 10 post-nuclear whorls, and measures: Length, 

 5.7 mm.; diameter, 1.8 mm. 



TURBONILLA (PYRGISCUS) TOYATANI, new species. 

 Plate 14. fig. 5. 



Shell broadly conic, wax yellow. Nuclear whorls decollated. 

 Postnuclear whorls appressed at the summit, marked by almost 

 vertical axial ribs, which are about two-thirds as broad as the spaces 

 that separate them. Of these ribs 22 occur upon all but the last 

 turn, which has 24. Intercostal spaces marked by 6 equal and 

 equally spaced, rather broad, deeply incised spiral lines, the first 

 of which is about 1 ^ times as far anterior to the summit of the whorls 

 as it is separated from the second, and three very fine lines. Two of 

 these fine spiral lines occur between the summit and the first deeply 

 incised line, while the third occurs halfway between the firat and 

 second deep spirals. Suture well marked. Periphery of the last 

 whorl feebly angulated, marking the termination of the axial ribs, 

 which become evanescent here. Base moderately long, well rounded, 

 marked by 13 incised spiral lines of somewhat varying strength and 

 irregular distribution. The space between the first of these lines and 

 the first line of pits on the spire is wider than any of the spaces be- 

 tween the strongly incised lines of the spire. Aperture ovate ; posterior 

 angle acute; outer lip thin, showing the external sculpture within; 

 inner lip oblique, slightly curved, and somewhat reflected; parietal 

 wall covered with a thin callus. 



The type, Cat. No. 252572, U.S.N.M., was dredged at Chincoteague, 

 Virginia. It has 10 post-nuclear whorls, and measures: Length, 5.3 

 mm.; diameter, 1.5 mm. 



TURBONILLA (PYRGISCUS) VIRGINICA, new species. 

 Plate 13, fig. 4. 



Shell elongate-conic, wax yellow with a darker golden yellow band, 

 which occupies the space bounded by the third and fourth incised 

 spiral grooves. Nuclear whorls decollated, the 3 succeeding badly 

 worn, the remainder well rounded, ornamented with retractive, 

 rounded, moderately strong, axial ribs, which are about two-thirds 

 as broad as the spaces that separate them. Of these ribs 22 occur 

 upon the fourth and fifth, 26 upon the sixth, and 28 upon the penulti- 

 mate whorl. In addition to the axial sculpture, the whorls are 

 marked by 5 equal and almost equally spaced, strongly incised 

 spiral lines, the first one of which is at a little greater distance 

 below the summit than the space which separates the first and second 



