6c MITRIDZ. 
nodulous ; aperture oval-oblong ; outer lip thin, crenulated ; columella 
straight, with two or three small oblique plaits in front ; animal of a dull 
red-colour. 
L. decoratus, Adams; P.Z.S., 1854, p. 316. Shell ovato- 
fusiform, white varied with chestnut, longitudinally plicated, transversely 
lirated, the lire alternately larger and smaller, two near the suture 
moniliform ; aperture oval; canal short; columella with three plice ; 
inner lip sulcated (Adams.) 
New Zealand. (Mus. Cuming.) Andaman Islands. (Smith P.Z.S. 
1878, p. 812.) 
FAMILY—MITRIDA: 
Teeth in three series (1. 1. 1.) the laterals. fixed, not versatile 
( Odontoglossate;) head small and narrow; tentacles close together at 
the base; eyes above the base or towards the outer middle of the 
tentacles; mantle enclosed; siphon simple at the base ; foot small, 
triangular ; operculum none or rudimentary. Shell with the columella 
more or less plicate ; apex of spire acute. 
Sub-Family—Mitrine. 
Head moderate ; eyes usually near the outer middle or tip of the 
tentacles ; foot truncate in front. Shell for the most part destitute of 
epidermis ; columella distinctly plicate. 
Genus, MITRA—-Lamark. 
Shell fusiform, thick ; spire elevated, acute ; aperture small, notched 
in front ; columella obliquely plaited ; operculum small. 
M. obscura, Hutton, C.M.M., p. 19. Shell ovato-conical ; spire 
acute ; whorls sub-carinate, those of the spire transversely plicate ; body 
whorl very finely longitudinally striated ; beak spirally striated behind ; 
aperture narrow; columella with four plaits, the anterior one small ; 
outer lip angled, deeply notched in front ; blackish-brown, spotted with 
white, especially on the spire ; interior purplish ; beak brown. 
Length, °64 ; breath, °33; angle of spire, 60°. 
Bay of Islands. A single dead specimen in’ the Colonial 
Museum, Wellington. 
M.rubiginosa, Hutton; CMI, p. 20 (Columbella.) Fusiform, 
smooth ; whorls transversely plicated ; spire elevated, acute; aperture 
rather broad ; outer lip thin; not swollen ; columella with four oblique 
teeth ; pink or brownish-pink. 
Length, :3; breadth, ‘15. 
Auckland to Lyttelton. Chatham Islands. 
Sub-Family— Columbelline. 
Head elongated ; eyes near the outer bases of the tentacles ; foot | 
anteriorly produced. Shell usually covered with an epidermis ; inner 
lip anteriorly toothed or tuberculed ; outer lip gibbous in the middle 
or at the hind part. 
