TROCHID&. 97 
inner lip thin, slightly expanded over the always open umbilicus ; 
purple, with oblique slightly waved white lines ; columella more or less 
stained with green. 
Length, *5 ; breadth, °6. 
Auckland. 
T. excavata, Adams and Angas, P.Z.S., 1864, p. 373 T. con- 
stricta, Hutton; Jour. de Conch., 1878, p. 33 (not of Lamark.) Shell 
depressedly conoidal, imperforate, yreenish, cinerous, ornamented with 
close undulating longitudinal purplish-black spots; whorls convex, 
transversely sulcated ; the last large, acutely angled at the periphery ; 
base flat ; aperture sub-quadrate, very oblique ; lip white, excavated ; 
inner lip smooth (A. & A.) 
Length, 3 lines; breadth, 4 lines. 
New Zealand. (Angas.) 
A depressed species, with a concave base, and with the inner lip 
excavated. 
Genus, CHLOROSTOMA—Swainson. 
Shell conoidal, usually deeply umbilicated, or with the umbilical 
region covered with a callus ; whorls smooth or longitudinally corruga- 
ted ; the last generally keeled at the periphery ; aperture oblique ; inner 
lip with an acute tubercle at the fore part, continuous with a spiral ridge 
which encircles the umbilicus; outer lip angular at the base, usually 
with one or two tubercles. 
C. niger, Chemnitz, v. pl , J. 1647 5 Trochus nigerrimus, Gml.; 
C. corrugatum, A. Adams, P.Z.S., 1851, p. 182. Shell orbicular- 
conoidal, deeply umbilicated ; spire sub-acute, longitudinally corruga- 
tely plicated and obliquely striated ; last whorl sub-rotund ; base flat, 
convex ; umbilical region white, sub-callous ; columella with two tuber- 
cles, the upper large (Adams.) 
I do not know on whose authority this shell has been put down to 
New Zealand. 
Genus, THALOTIA—Gray. 
Conical, turreted, solid, granulated, imperforate ; mouth longer than 
wide ; columella sub-truncate, tubercular ; outer lip thickened and cre- 
nulated within ; operculum multi-spiral. 
T. conica, Gray, in King’s Vovage, Appendix i., p. 479 ; Adams’ 
Gen. Moll., pl. 48, f. 1; Chenu, f. 2620. Whorls 7, ornamented with 
spiral moniliform lines, of which there are six on the spire whorls, and 
about eight on the body whorl in front of the mouth ; columella ending 
abruptly in a rounded tooth; body whorl dark-purple, with oblique, 
more or less zig-zag pale lines; spire whorls paler, the beading spotted 
with brown and dark purple ; often pale purple, with the beading dark- 
purple. 
Length, 75 inch. 
Auckland (?) Australia. Tasmania. 
