Pyramidellidae 119 



Genus TUKBONILLA Risso, 1826 



Subgenus STRIOTURBONILLA Sacco, 1892 



Turbonilla^os dalli Bush PI. 23, fig. 155 



Alt., 8 mm., spire, 6.25 mm. Shell milky white, glossy, elongate- 

 conic; apex of about two nuclear whorls obliquely tilted from vertical 

 axis; 12 convex whorls, the lower three slightly flattened; strong, 

 slightly oblique axial ribs, not continuous over sutures, 16 to 18 

 on body whorl; intercostal spaces excavated, not extended to sutures 

 and spirally striate with fine lines; sutures impressed, distinct, 

 aperture simple, outer lip sharp, rounded; columellar lip straight, 

 thickened, not plicate, upper margm oblique; axial ribs extend over 

 base to umbilical region. 



Found on sandy bottom at moderate depths. 



Turbonilla hemphilli Bush PI. 23, fig. 156 



Alt., 10 to 12 mm. Shell buff or pale brown with waxy lustre, 

 often with wide, dark band below suture, apex acute^with about two 

 nuclear turns, obliquely tilted; 12 to 14 whorls, only slightly convex, 

 flattened at periphery; sutures distinct, impressed; 18 or 19 almost 

 vertical axial ribs, extending to, but not crossing sutures, interspaces 

 about width of ribs, spirally striate; aperture like that of T. dalli 

 to which the species is closely allied. 



Found on sandy bottoms at moderate depths. 



Turbonilla eonradl Bush PI. 23, fig. 157 



Alt., 10 to 12 mm. Shell buff or pale brown with waxy lustre, 

 often with wide dark band below sutures; apex acute, two nuclear 

 whorls almost transverse to vertical axis; 12 to 14 whorls, only 

 slightly convex, lower whorl slightly overlaps one above; sutures 

 incised, distinct; axial ribs not crossing sutures, 18 to 22 on body 

 whorl, almost vertical, sometimes curved; intercostal spaces about 

 width of ribs, spirally striate; base with three fine incised spiral lines 

 and concentric striations; aperture as in other Turbonillas. 

 Mainly a littoral species. 



2<*8 Lat., dim. of turbo, a top. 



