I 



NO. 1452 NOTES ON PYRAMIDELLID.E—DALL AND BARTSVlI. 30 1 



ODOSTOMIA (EVALEA) CULTA, new species. 

 Plate XXVI, tig. 9. 



Shell reg-ularl}^ conic, uinbiliciited, yellowi.sh white. Nuclear whorls 

 apparently planorboid, very obliquely, almost completely, immersed in 

 the first of the later whorls, only a portion of the last volution being- 

 visible. Post-nuclear whorls rather high lietween the sutures, slightly 

 rounded (almost flattened), and sul)tabulately shouldered at the sum- 

 mits, marked by line lines of growth and very man}' subequal, wavy, 

 closely spaced striations. (These have not been indicated in our draw- 

 ing.) The whorls are somewdiat angulated at the peripher}' and the 

 summit of succeeding whorls falls a little anterior to the periphery, 

 which gives the sutures a decidedly channeled efi^'ect. Base of the last 

 whorl large, rather prolonged, well rounded, marked b}^ spiral stria- 

 tions which are equally as abundant as those between the sutures but 

 somewhat stronger. Aperture raoderatel}^ large, suboval, somewhat 

 ett'use anteriorly, posterior angle obtuse, outer lip thin (fractured), 

 columella slender, curved, reflected partly over the moderately large 

 umbilicus, provided with a strong, acute, oblique fold near its insertion; 

 parietal wall covered by a thin callus. 



The type was collected at Hakodate, Japan, b}^ Hilgendorf. It has 

 six post-nuclear whorls and measures: long. 4 mm.; diam. 1.8 mm. 



This is a moderately large species characterized by its spiral stria- 

 tions, regular conic outline, and the constricted appearance of the 

 whorls at the channeled sutures. It is evident!}' related to Odostoinia 

 {E'valea) arcwita A. Adams. 



. ODOSTOMIA (AMAURA) MARTENSI, new name. 



Plate XXV, fig. 5. 



Odostomia curia Clessin, Mart. Chein. Conch. Cab., 1900, p. 116, pi. xxviii, fig. 3. 

 Not Odostomia curtiim Desiiayes, An. Sans. Vert. Paris Basin, 1864, p. 551, 

 pi. XIX, figs. 9-11. 



Shell ovoid, heavy, yellowish white, nuclear whorls small, almost 

 completely- immersed in the first of the succeeding volutions. Post- 

 nuclear whorls increasing regularly and rapidly in size, inflated, sub- 

 tabulately shouldered at the summit, marked l)y numerous fine lines 

 of growth and equally abundant, closely placed, wavy, spiral striations. 

 These lines of growth and spiral markings give the surface a finely 

 reticulated appearance when viewed under higii magnification. (We 

 have omitted this sculpture in our drawing, which should be considered 

 as an outline sketch only.) Periphery and base of the last whorl 

 decidedly rounded and inflated, marked like the space between the 

 sutures. Aperture large, suboval, slightly effuse anteriorl\% posterior 

 angle acute; outer lip sharp at the edge but thick within; columella 

 ver}' strong, curved, reenforced by the body whorl from which the 



