bi! 
437 
columella twisted and rolled, being produced in a tubular form, 
perforate. Colour cinereous, marked with irregular brown spots and 
blotches ; apex reddish or purplish brown. 
TUGALIA OBLONGA. 
Shell oblong oval, depressly conical, radiately ribbed; ribs granulose, 
_ interstices decussated by concentric raised striz ; apex near posterior 
margin white. 
SCUTELLINA CANCELLATA. 
Shell oval, somewhat conical ; surface cancellated by fine radiating » a, -o 
ribs and concentric raised strize ; apex extending to the posterior 
margin. Colour white. 
MUCRONALIA ROSEA. 
Shell elongate ovate, smooth, polished ; whorls six, convexly 
rounded ; aperture oval. Colour rose-pink. 
Found on Echini. 
MucronaLia NITIDULA. 
Shell small, subulate, thin, polished, vitreous; whorls convexly 
rounded, five in number, nucleus of three whorls slightly distorted ; 
aperture small, ovate ; inner lip slightly thickened and reflected at 
its junction with the columella. Colour white or light fawn-colour. 
Lives on Holothurie. 
MucrRonaALIA OVATA. 
Shell elongately ovate, light, dull shining ; whorls five, slightly 
convex ; inner lip thickened at the base and extending by a callosity 
over the columella to the junction of the outer lip. Colour dull 
white. 
Lives on Echini. 
STYLIFER ROBUSTUS. 
Shell globosely ovate, light, polished; finely striated longitudinally ; 
whorls convex and marginated, last whorl swollen, sutures well im- 
pressed ; inner lip slightly reflected at its Junction with the columella 
and around the base, disappearing at about the centre of the outer 
lip. Colour white. 
Lives on Echini. 
PATELLA SANDWICENSIS. 
Shell ovate, raised ; apex slightly anterior, radiately ribbed ; ribs 
irregular, crenate, alternately smaller. Colour fulvous ; ribs black ; 
interior iridescent, silvery-biue. 
TECTURA RADIATA. 
Shell conical, oval, smooth, radiately ribbed ; ribs few in number, 
wide, and becoming obsolete on the upper half of the shell ; apex in 
