194 BULLETIN G8, UNITED STATES NATIONAL MUSEUM. 



Shell not. umbilical od— Continued. 



Incised spiral linos only moderately strong — Continued. 

 Periphery of the last whorl well rounded. 



Summits of the whorls tabulately shouldered serilla, p. 209. 



Summit of the whorls not tabulately shouldered. 



Shell broadly conic tacomaensis, p. 209. 



Shell elongate-conic. 



Shell very small, adult 3.3 mm. long ainchitJcana, p. 210. 



Shell larger, more than 5 mm. long stephensi, p. 210. 



Shell elongate-ovate dessini, p. 211. 



Incised spiral lines exceedingly fine. 



Periphery of the last whorl strongly angulated. 



Shell conic minutissima, p. 211. 



Shell broadly conic - raymondi, p. 212. 



Periphery of the last whorl subangulated. 



Shell large, adult more than 6.5 mm. long gravida, p. 212. 



Shell small, adult less than 4 mm. long. 

 Shell elongate-ovate. 



Summit of the whorls subtabulated notilla, p. 213. 



Summit of the whorls slopingly shouldered movilla, p. 213. 



Shell ovate altina, p. 214. 



Periphery of the whorls well rounded. 

 Summit of the whorls tabulated. 



Shell small, adult 4.5 mm. long profundicolu, p. 214. 



Shell larger, adult 6.3 mm. long baranoffensis, p. 215. 



Summit of the whorls not tabulated. 

 Shell broadly conic. 



Columella almost straight sitka'ensis, p. 215. 



Columella very strongly curved hagemeisteri, p. 216. 



Shell conic. 



Shell minute, adult 2.2 mm. long resina, p. 216. 



Shell larger, adult 4 mm. long deliciosa, ]i. 216. 



Shell slender, conic. 



Spiral striations on base and spire uniform parella, p. 217. 



Spiral striations stronger on the base than spire, g^ranarfensis, p. 217. 



ODOSTOMIA (EVALEA) NUNIVAKENSIS, new species. 

 Plate 22, fig. 6. 



Shell elongate ovate, deeply umbilicatecl, milk-white. Nuclear 

 whorls small, deeply obliquely immersed in the first of the succeeding 

 turns. Post-nuclear whorls increasing very regularly in size, rather 

 high between the sutures, well rounded with strongly tabulated sum- 

 mits. Suture strongly marked. Periphery and base of last whorl 

 well rounded, umbilicus bounded by a slender thread. Aperture 

 elongate-ovate, posterior angle obtuse; outer lip thin; columella 

 slender, f-shaped, slightly revolute, free from the base, armed with a 

 strong fold near its center. Entire surface crossed by fine lines of 

 growth and exceedingly fine, closely spaced, wavy spiral striations. 



The unique typo (Cat. no. 159476, U.S.N.M.) was collected by Dr. 

 William H. Dall at the north end of Nunivak Island, Alaska. It has 

 five post-nuclear whorls and measures: Length 3 mm., diameter 1.6 

 mm. TJK^ (i]i(> spiral striations have been omitted in the drawing. 



