DRILLTA. 179 
D. aipposaA, Born. PI. 9, fig. 54. 
Yellowish white or brownish, usually interruptedly broad- 
banded above and below the middle of the last whorl; spire 
turreted, the whorls with a sutural cord, and smooth, slightly 
concave shoulder, the periphery nodulous with the terminations 
of oblique, longitudinal ribs, which are crossed by strong 
revolving lines; labium with a very strong projecting superior 
callus; outer lip winged, with a second small sinus indicated 
towards the base. L. 60, diam. 20 mill. West Indies. 
Allied to D. flavidula, but heavier, with shorter canal, and 
usually differently colored in having the pair of more or less 
interrupted, and mostly faint-colored bands. 
DP. ALABASTER, Reeve. Pl. 11, fig. 78. 
Shell turreted, snowy white, sometimes faintly rose-tinged ; 
longitudinally ribbed, with very fine revolving grooves and 
striz ; somewhat depressed next the suture; sinus broad. 
Length, 30 mill. 
Philippines (Cuming) ; Darnley I, Australia (Brazier). 
The sculpture is exceedingly delicate, the cross-grooves 
looking as if they had been graved with an etching point. 
PeOMRMICATA, Gray. Pl.-11, figs. 82, 91; Pl. 8, fig. 24; Pl. 30, 
fig. 78. 
Shell light yellowish brown or yellowish white; with promi- 
nent, distant ribs, forming a strongly tuberculate shoulder, and 
revolving striz; sinus produced upwards; inner lip thickened 
below, forming with the axis a false umbilicus. 
Length, 1-2 inches. 
Sierra Leone (Gray); West Indies (Swift). 
D. Dunkeri, Weinkauff (PI. 8, fig. 24 , is an immature example 
of this species. D. Saulcydiana, Recluz (fig. 91), varies a little 
in sometimes possessing a broad indistinct central band of light 
chestnut ; the shells are adult, although not so large as the type. 
Of its identity with D. wmbilicata there can be no question. 
D. Rosacea, Reeve. PI. 13, fig. 51. 
Longitudinally closely ribbed, with fine revolving striz, con- 
cave and smooth above the periphery; canal very sbort, sinus 
broad and large; rose-colored throughout. Length, 20 mill. 
W. Coast of Africa (Maltzan). 
