GEMMULA. Lis 
P. piFFiciLis, Smith. Pl. 32, fig. 16. 
About ten rather coarse spiral lire on the last whorl, the 
sinus above the submedian liration; brownish horn-color. 
Length, 7 mill. 
Japan. 
Subgenus GeMMuLA, Weinkauff. 
P. speciosa, Reeve. PI. 4, fig. 48. 
Shell erenulately carinate or ribbed, the principal carina, 
forming the angle of the whorls, corded, with a sloping shoulder 
above it; yellowish white, the ribs ochraceous. 
L. 47, diam. 18 mill. 
China. 
P. caninarA, Gray. PI. 4, fig. 49. 
Shell closely encircled by sharp ribs and intermediate striz, 
the slit-band a pair of beaded ribs; suture channeled ; yellowish 
white, chestnut-spotted on the ribs; fissure wide and deep. 
L. 65, diam. 20 mill. 
Habitat unknown. 
P. Kieneri, Doumet, is a synonym. 
P. Grarret, Weinkauff. PI. 4, fig. 50. 
Shell brownish, crenulately carinate or cingulate, the ribs 
lighter-colored, the median carina stronger, with larger crenula- 
tions; aperture plicate within. L. 20, diam. 6 mill. 
Viti Islands. 
Doubtfully distinct from the next species. 
P. gemMaTA, Hinds. PI. 4, figs. 51, 54. 
Shell more slender than the preceding species, with a more 
prominent noduled keel, and spiral lirule; yellowish brown, 
the keel usually white, sometimes indistinctly brown-banded 
above and below it. L. 26, diam. 7°5 mill. 
Red Sea, Japan, Australia (Brazier), 
Viti Islands (Garrett). 
Hinds’ locality, Magdalena Bay, Lower California, has not 
been confirmed. P. monilifera, Pease (fig. 52), is perhaps 
somewhat stouter, with shorter spire and canal in the examples 
figured by Weinkauff, but from those before me I am convinced 
that it passes into the typical gemmata. 
P. fusca, Hombron et Jacq. (fig. 53), although figured as of a 
