80 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 70 



the nuclear spire projects beyond the outline of the postnuclear spire. 

 Postnuclear whorls almost flattened, almost appressed at the summit, 

 marked by very strong, slightly curved, almost vertical axial ribs, of 

 which 16 occur upon the first to fourth, 18 upon the fifth to seventh, 

 20 upon the eighth, and 22 upon the last whorl. These ribs become 

 slightly flattened and expanded near the summit of the whorls. The 

 intercostal spaces are deep. Suture moderately constricted. Periph- 

 ery of the last whorl well rounded. Base short, well rounded. 

 The entire surface of the shell marked by rather close incremental 

 lines and rather coarse spiral striations. Aperture subquadrate; 

 posterior angle obtuse; anterior portion of the outer lip fractured; 

 inner lip stout, reflected over and appressed to the base for about half 

 its length, provided with an obsolete fold a little anterior to its 

 insertion. 



The type, Cat. No. 108060, U.S.N.M., comes from United States 

 Bureau of Fisheries Station 2668, in 294 fathoms, sandy bottom, 46.3° 

 bottom temperature, off Fernandina, Fla. It has 9.3 whorls and 

 measures: Length, 7.3 mm.; diameter, 2.1 mm. 



Cat. No. 108362, U.S.N.M., contains seven specimens from United 

 States Bureau of Fisheries Station 2415, in 440 fathoms, sandy bot- 

 tom, 45.6° bottom temperature, off Georgia. 



TURBONILLA (STRIOTURBONILLA) LETA, new species 



Shell small, pupoid, milk white. Nuclear whorls two and a half, 

 forming a planorboid spire, the axis of which is obliquely placed to 

 that of the succeeding turns, in the first of which the nuclear spire 

 is about one-fourth immersed. Postnuclear whorls flattened, nar- 

 rowly shouldered at the summit, the first with mere indications of 

 axial ribs, while on the remaining turns they are more strongly 

 developed, though on none prominent. Of these ribs, 12 occur upon 

 the second, 14 upon the third, 16 upon the fourth and the last whorl. 

 These ribs are low and broad and about as wide as the shallow spaces 

 that separate them. Suture moderately constricted. Periphery of 

 the last whorl well rounded. Base rather long, well rounded. The 

 entire surface of spire and base marked by fine incremental lines and 

 numerous closely spaced wavy spiral striations. Aperture oval; 

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

 within; inner lip somewhat curved, reflected and appressed to the 

 base for about half its length and provided with an obsolete fold near 

 its insertion. 



The type. Cat. No. 108062, U.S.N.M., comes from United States 

 Bureau of Fisheries Station 2668, in 294 fathoms, sandy bottom, 46.3° 

 bottom temperature, off Fernandina, Fla. It has 6.1 postnuclear 

 whorls and measures: Length, 3 mm.; diameter, 1 mm. 



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