CLASS GASTROPODA 
167 
usual in spiral shells; surface plicate longitudinally, crossed by engraved 
revolving lines; columellar plaits six or seven, or more; lip thickened 
within, its margin slightly crenulate. (Tryon, Structural and Systematic 
Conchology .) 
Type. Voluta rupestris Gmelin. 
Distribution. Indian Ocean, Japan, Alaska, Australia, Eastern Poly¬ 
nesia, Atlantic Coasts of southern South America, to West Indies, south¬ 
ern Africa. 
Scaphella (Voluta) arnheimi J. J. Rivers, 1891 
Proceedings of the California Academy of Sciences, 3, Part 1: 107. 
Shell regularly formed, elongate-ovate; body whorl more than two- 
thirds as long as the spire; the spire an inch long, and made up of six 
whorls, the terminal nucleus being very small, pointed and oblique, which 
latter character places this species in the section Scaphella of Dali. Ground 
color obscure yellow, covered by a layer of chalk-like deposit. The body 
whorl has some coarse longitudinal elevations and depressions, remnants 
of former lip extensions, and there are two large patches of dark rusty 
red at a wide interval which do not appear to form an interrupted band. 
The aperture is elegantly formed and measures 1% in. long by % in. wide; 
the inner lip is regularly outlined on the columella; columella plaits four, 
sharply oblique, the last one strongest, forming a prominent ridge parallel 
to the canal. The upper outlines of the mouth meet in a sharp angle, but 
the base has a well-defined bifurcation. The whole of the aperture and the 
edge of the outer lip are heavily coated with enamel of a yellowish tint, and 
rust stained. Size 3}4 in. long and 1*4 in- wide. Animal without oper¬ 
culum. (Rivers.) 
Type in California Academy of Sciences. Type locality, dredged in 
Monterey Bay, California. 
Range. Known only from type locality. 
Subgenus Boreomelon Dali, 1919 
Fulgoraria stearnsii Dali, 1872 
Plate 23, fig. 4 
Proceedings of the California Academy of Sciences , 4:270; PI. 1, fig. 1. 
Shell large, slender, spindle-shaped, moderately thick. Color livid 
purple, more or less obscured by an ashy-white outer layer, more con¬ 
spicuous near the sutures and on the callosity of the inner lip. Exterior, 
smooth (but not polished) except for the strong lines of increase. Sutures 
appressed; siphonal fasciole strong; nucleus small, white mammillated. 
[167] 
