NOj\rENCLATURE. 
15 
scrohiculati. Scrobiculate ; covered with small 
pits or excavations. 
scripti. Lettered ; marked with various charac- 
ters resembling letters. 
Mnistri. Left-handed ; heterostrophous, turning 
round the pillar from right to left, in- 
stead of pursuing their usual, opposite, 
course. 
spinoso-radiati. Spinosely radiate ; beset with 
spines in a circle, either concatenate, 
united at their bases, or setaceous, like 
bristles. 
striati. Striate ; encompassed with very fine 
raised or excavated lines : punctate striae 
are those which have elevated or impressed 
points placed along them; the points may 
be concatenate, strung like beads, or per- 
tuse, deeply excavated. 
sulcati. Sulcated ; marked with broader lines, 
either hollow, ridged, or elevated. 
Apertura. Aperture, Mouth; the orifice, 
entrance, or opening of the shell. 
himar Rinata. Bimarginate ; having the lip with 
a double margin. 
