42 TEREBRID. 
Genus, ACUS—Humphrey. 
Eyes on the tips of the short tentacles. Shell subulate, whorls 
numerous, simple; aperture elongate, emarginate anteriorly, not produced 
into a canal; columella simple, incurved, not tortuous ; outer lip simple, 
acute, without a sinus at the fore part. 
A. kirki, Hutton, CMM, p. 27 (Cerithium). Whorls flatish, 
smooth, polished, transversely plicated ; body whorl small ; mouth oval, 
columella smooth, straight ; canal short, slightly bent to the left. Greyish 
black, greyish, or yellowish white, spirally banded near the mouth with 
purplish brown. 
Length, °8; breadth, -22; angle of spire, 18°. 
Auckland to Dunedin. 
Dr. v Martens thinks that this may be identical with 7: calgznosa, 
Desh (Reeve, Conch Ic. f. 100) from the Philippine Islands. 
FAMILY—PLEUROTOMID:. 
Teeth elongate, subulate. Mantle with a slit in the hinder part of 
the right side; siphon straight. Shell turreted, sub-fusiform ; aperture 
with the fore part channelled, straight, and often much produced ; outer 
lip detached at the hind part from the body whorl, forming a sinus, or 
with the margin fissured near the last whorl. 
Genus, PLEUROTOMA—Montf. 
Tentacles wide apart ; eyes at their outer bases. Shell turreted, fusi- 
form ; spire elevated, aperture oval ; canal long and straight ; columella 
smooth ; outer lip notched anteriorly, and with a deep slit near the 
suture. Operculum ovate, acute, nucleus apical. 
P. buchanani, Hutton; Cat. Ter. Moll. of N.Z, p. 4. Shell 
fusiform, elongated ; spire acute ; whorls carinated, with fine spiral lines, 
and obliquely plicated anteriorly ; posterior part smooth, concave, with 
a slight ridge at the suture ; aperture oval ; canal produced ; body whorl 
longer than the spire. 
Axis, ‘85 ; breadth, ‘27 ; angle of spire, 30°. 
Auckland. 
P. trailli, Hutton; CALM. p. 11. Spire acute, with broad, shallow, 
spiral grooves, and prominent transverse ribs on the central and anterior 
portions of the whorls ; posterior margin, near the suture, flat ; aperture 
oval, canal short. Yellowish brown ; body whorl shorter than the spire. 
Length, 1°1 ; breadth, :4; angle of spire, 28°. 
Stewart Island, 24 fathoms. 
I once thought that this was the same as /. d@tica, Reeve, but I now 
doubt it. 
