SURCULA. 241 
spirally ridged; yellowish white, the superior ridge on each 
whorl articulated with chestnut and white. L. 16, diam. 6 mill. 
Isl. Annaa (Cuming); Cook’s Islands (Garrett). 
This is the S. interrupta of Sowerby, not Lamarck; S. modesta 
of Weink., not Sowb. (fig. 86 a). 
S. cincta, Lamarck. PI. 6, fig. 86. 
Spire convex in outline, slightly acuminated towards the tip; 
whorls encircled throughout with tumid ridges ; yellowish brown 
or reddish brown, aperture same color. L. 14, diam. 5:5 mill. 
Real Llejos (probably erroneous), and Jsl. Annaa 
(Cuming); Mauritius (Weinkauff) ; 
Viti Islands (Garrett). 
This is the S. modesta, Sowb.,and the shell described and 
figured under that name by Weinkauff — the preceding species. 
S. BIJUBATA, Reeve. PI. 6, fig. 87. 
Shell chocolate-brown, encircled by narrow, lighter-colored 
keels, the second keel, which is somewhat stronger than the 
others, often broken up into small tubercles ; interior of aperture 
chocolate-colored. L. 20, diam. 8 mill. 
Philippines (Cuming) ; Mauritius (Robillard) ; 
Viti Isles (Garrett); Solomon Islands (Smith). 
Distinguished from the preceding species by its narrower 
form, longer spire, sharper ridges and darker color. 
S. RapuLA, Hinds. PI. 7, figs. 89, 88, 90. 
Shell dark brown, encircled by ridges of which the one 
defining the shoulder-angle and those below it are granular or 
tuberculate; the angle-row’ usually white; sometimes with 
chestnut bands. L. 18, diam. 6 mill. 
Red Sea, Malacca, Australia. 
S. versicolor, Weink. (fig. 88), is merely a variegated speci- 
men, and S. raduliformis, Weink. (fig. 90), has the sculpture not 
so strongly developed. I am inclined to think that P. Wetcalfei, 
Angas, P. obeliscus, Reeve, P. pyramidata, Val., which I have 
treated under Drillia, will need to be united with this form when 
fuller series shall be available for comparison, 
