86 CALYPTRIDA. 
S. Australis, Quoy, Zc, ill., p. 302; Chenu, fig. 2310. Shell 
irregularly spiral, sub-cylindrical, transversly rugose ; longitudinally finely 
striated ; white, reddish behind. (Quoy.) 
Length, 4 inches 2 lines ; diameter of tube at the base, 8 lines. 
Australia. 
A small Sz/éguarta, found in the Hauraki Gulf, may perhaps belong 
to this species. 
FAMILY—CALYPTRID.. 
Rhachis teeth small and broad, with the apex hooked, the lateral 
teeth flong and hamate. Head large, transverse ; muzzle slightly pro- 
duced, furnished anteriorly with buccal appendages ; tentacles short, 
subulate, eyes small, on bulgings at their external bases ; mantle con- 
siderably developed, lining the shell, simple edged in front; branchial 
plume single, placed obliquely across the mantle cavity; foot flat, ex- 
panded ; operculum none. Shell patelliform ; apex more or less spiral ; 
aperture wide, with an internal shelly appendage. The eggs are carried 
and hatched under the neck, in front of the foot. 
Genus, TROCHITA—Schumacher. 
Foot transversely-oblong, bilobed in the middle in front. Shell 
orbicular, trochiform, more or less spiral; apex central or sub-central ; 
whorls convex, radiately rugosely plicate; axis imperforate ; aperture 
wide, with an oblique transverse, sub-spiral lamina, simple on the 
columella margin. 
T. scutum, Lesson; Voy. Coquille, Zool., i., p. 3953 T: tenuis, 
Gray, P.Z.S., 1867, ~p. 735. Depressed ; spire conical, salient, almost 
median ; surface with concentric striz, covered with a yellowish epider- 
mis; aperture entire, rounded, thin; interior pearly, very smooth; 
columella short, a little dilated at its base, and continued as a thin 
horizontal lamina, striated and convex above, indented in front and 
connected with the edge on the left side ; umbilicus none (Lesson.) 
Length, rx lines ; breadth, 9 lines ; height, 4 lines. 
Auckland to Dunedin. 
T. novee zealandie, Lesson, Zc, i., ~. 395; Z: maculata, Quoy, 
and Gaunara, UG. Inn: A2Z2, Plo 72,9. 0-0 3 NCeUe CONG IC., yen 
Shell rounded, convex; spire small, conic, salient, lateral, posterior, 
covered with a thick epidermis, lamellate, and with three elevated rays ; 
interior concave, pearly ; aperture entire, thin ; columella lateral, dila- 
ted at its insertion and furnished with a triangular lamina which partly 
hides the wide umbilicus ; the columella is continued into a transverse 
lamina, indented on its free border, and attached to the left margin ; 
this lamina is pearly, slightly convex, smooth ; epidermis deep greenish- 
yellow ; interior white ; a spot of purple in the centre (Lesson. ) 
Length, ro lines; breadth, 8 lines ; height, 34 lines. 
Auckland to Dunedin. 
