102 TROCHID, 
M. egena, Gould, U.S. Ex. Ep., p. 196, f 228 (Solarium ;) M. 
zealandica, Hutton, C.M.M. Spire acute; whorls deeply spirally 
grooved, some of the ridges sub-granular ; umbilicus transversely finely 
striated ; brownish-white, with radiating fiexuous bands of brownish- 
purple. 
Length, ‘2 ; breadth, 3 ; angle of spire, 80°. 
Auckland. 
Genus, GIBBULA—Leach. 
Conical, solid, generally umbilicated ; aperture sub-rhomboidal, the 
angles rounded; columella gradually arched; operculum of many 
gradually enlarging whorls. 
G. sanguinea, Gray, Dief NZ, ii., p. 238; Smith’s Voy. Erebus 
and Terror, pl. 1, f, 12. Shell top-shaped ; white, with rows of numer- 
ous blood-red spots; whorls flattened, the last obscurely keeled ; the 
front rather convex, with sharp-edged, low, spiral keels (Gray.) 
Auckland. Chatham Islands. 
G. simulata, Hutton, CMM, p. 36. Whorls convex, faintly 
spirally striated, umbilicus generally closed; pink or pinkish-brown, 
generally with white markings on the spire. 
eneth, -3'5 breadth, -25. 
Chatham Islands only. 
G. nitida, Adams and Angas, P.Z.S., 1864, p. 36. Shell elevately- 
conoidal ; apex obtuse, widely umbilicated, smooth, shining, greenish- 
yellow, painted with longitudinal purple and red flammules, and with 
transverse interrupted Jines of the same; whorls swollen, trans- 
versely striated, the last obtusely angled at the periphery; base 
convex ; umbilicus angled at the margin; aperture rotundo-quadrate; 
interior vividly iridescent ; lip simple ; inner lip sulcated (A. & A.) 
Length, 24 lines ; breadth, 24 lines. 
Hokianga. (Angas.) 
G. inconspicua, Hutton, CALM. p. 36. Depressed; whorls 
convex, faintly spirally striated ; umbilicus always open; brownish- 
green or brown, more or less marked with purplish-brown and white. 
Length, ‘15 ; breadth, -2. 
Perhaps the same as the last. 
G. oppressa, Hutton, Jour. de Conch., 1878, p. 34. Whorls 
flattened posteriorly, and more or less keeled ; closely spirally ribbed, 
the ribs rounded but rather rough ; axis sub-perforated ; aperture sub- 
rhomboidal ; dark purplish-black. 
Length, ‘23; breadth, -25. 
Auckland. 
Genus, MARGARITA—Leach. 
Shell thin, usually without any colouring, globosely conoidal, umbili- 
cated ; whorls rounded, smooth or transversely striated ; aperture nearly 
circular ; columella ending in a simple point. 
