74 PBOCEEDINGS OF THE NATIONAL MUSEUM vol.70 



ing 21 specimens, were represented at both stations. StrioturhonUla 

 was the group most numerously represented; there are three Odosto- 

 mias, and five species representing subordinate groups of the genus 

 Pyramidella. 



The species of this family included in this paper have been studied 

 and described by my colleague, Dr. Paul Bartsch, who should be cited 

 as the authority for the specific names. 



Genus PYRAMIDELLA Lamarck 



Subgenus Longchaeus Morch 



PYKAMIDELLA (LONGCHAEUS), species 



A young specimen of 4.5 whorls, Cat. No. 107927, U.vS.N.M., was 



dredged at United States Bureau of Fisheries Station 2668, in 294 



fathoms, sandy bottom, 46.3° F. bottom temperature, off Fernan- 



dina, Fla. 



Subgenus Sulcorinella Dall and Bartsch 



PYRAMIDELLA (SULCORINELLA) CAMARA, new species 



Shell elongate-ovate, bluish white with a narrow opaque band a 

 little anterior to the summit of the whorls. Nuclear whorls forming 

 a depressed helicoid spire the axis of which is at right angles to that 

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

 deeply immersed, only two-fifths of its tilted edge projecting. Post- 

 nuclear whorls flattened, with a concave shoulder at the summit, 

 smooth excepting fine incremental lines and exceedingly fine spiral 

 striations. Suture deeply channeled. Periphery of the last whorl 

 provided with a rather strong narrow keel. The summit of the suc- 

 ceeding turns falls a little anterior to this keel and thus produces 

 the broadly channeled suture. Base short, slightly rounded, nar- 

 rowly, openly umbilicated, marked like the spire. Aperture rhom- 

 boidal; posterior angle obtuse; outer lip thin; inner lip curved, 

 reflected over but not appressed to the base, provided with a strong 

 oblique fold at its insertion. 



The type, Cat. No. 108383, U.S.N.M., comes from United States 

 Bureau of Fisheries Station 2415, in 440 fathoms, sandy bottom, 45.6° 

 bottom temperature, off Georgia. It has five postnuclear whorls and 

 measures. Length, 2.8 mm.; diameter, 1.3 mm. 



Cat. No. 360168, U.S.N. M., contains two additional specimens from 



the type locality. 



Subgenus Syrnola A. Adams 



PYRAMIDELLA (SYRNOLA) FERNANDINA, new species 



Shell elongate-conic, slender, milk white. Nuclear whorls two and 

 a half, forming a depressed helicoid spire, the axis of which is at right 

 angles to that of the succeeding turns, in the first of which the nuclear 

 spire is about one-third immersed. Postnuclear whorls flattened, 



