Huvrros.—0On New Tertiary Mollusca from Canterbury. 595 
rounded transverse ribs. Eleven or twelve ribs on the body whorl. Suture, 
closed over. Aperture, with a small posterior sinus. Canal, rather long, 
strongly twisted to the left, and slightly recurved. Axis, 1-2; breadth, -75. 
Localities : Mount Harris and White Rock River. 
Closely allied to Buccinum modificatum, Reeve, but the canal is more 
twisted. 
DRILLIA FUSIFORMIS, sp. nov. 
Plate XVI., Fig. 8. 
Elongato-fusiform. Whorls, nine, rounded, with rather oblique trans- 
verse ribs on the central portion. "There are ten ribs on the body whorl. 
Anterior portion of the whorls with spiral sub-moniliform stris. Spire, acute, 
nearly as long as the body whorl. Aperture, oval, rather suddenly con- 
tracted into the canal, which is short and nearly straight. Sinus, broad. 
Axis, 1:0. Breadth, 7. 
Locality: Mount Harris. 
Somewhat approaching D. flavidula, Lam., from China and Japan, but 
the transverse ribs are not knobby, and the spire is much shorter. 
BELA (P) ROBUSTA, sp. nov. 
Plate XVI., Fig. 4. 
Ovato-fusiform. ^ Whorls, seven, concave and finely spirally striated 
posteriorly, and with low, rather distant, rounded, spiral ribs anteriorly. 
There are from ten to fifteen of these spiral ribs on the body whorl, and 
they are crossed by oblique lines of growth. Aperture, elongated. Outer 
lip slightly angled posteriorly. Columella, smooth, rounded. Canal, short, 
slightly twisted, and recurved. Axis, 1:45. Breadth, ‘7. 
Locality: White Rock River. 
Similar in form to B. decussata, from Britain, but very differently 
marked. 
CLAVATULA HAASTI, sp. nov. 
Plate XVI., Fig. 5. 
Broadly fusiform. Spire, acute. — Whorls, eight, concave and spirally 
striated posteriorly, sharply keeled, and with rather distant spiral moniliform 
lines, crossed by oblique lines of growth anteriorly. There are about twenty 
of these lines on the anterior portion of the body whorl, in front of the keel. 
Aperture, elongated. Outer lip, angled posteriorly. Columella, with a slight 
swelling in the middle. Axis, 1:55. Breadth, -78. 
Localities : White Rock River and Mount Harris. 
The nearest ally of this very distinct species is C. mystica, Reeve, but 
our shell has no nodules. 
DEFRANCHIA EXCAVATA, sp. nov. 
Plate XVI., Fig. 6. 
Small, fusiform, turreted. Whorls, seven or eight, sharply keeled, and 
