68 TRICHOTROPID. 
Shell ovato-acute; whorls angled, with a row of nodules on the 
ridge ; spirally striated ; whorls seven or eight ; yellowish, with close 
longitudinal waved stripes of purple; interior purple ; mouth yellow, or 
white in old shells. 
Length, 3°5; breadth, 1°9; angle of spire, 55°. 
Var. B.—Dark reddish-brown, covered with a white chalky epider- 
dis ; mouth greyish-white, stained with black on the outer edges. 
Var. C.—S. gigas, Sowerby ; Chenu, f.1651; S. vermis, Reeve; whorls 
rounded, sub-nodulose. 
North Island, common. Stewart Island, rare. 
S. australis, Gm/.; Buccinum vermis, Martyn ; Adams Gen. of 
Shells, pl. 27, f- 6; S. crenulata, Lamark; Quoy and Gaimard, L.c., 
il., 2. 430, D4 31,f- 7-93 S. australis, Reeve; Conch. Ic., f. 1; Chenu, 
Ff. 1653. Shell ovato-acute ; whorls 6, angled, sub-noduse, finely spirally 
striated ; body whorl flattened in the centre; columella very oblique ; 
reddish-brown, with longitudinal undulating streaks of darker ; mouth 
yellowish-brown ; interior pale violet. 
Length, 1°75; breadth, 1; angle of spire, 55°. 
Not found south of Cook Strait. Animal yellowish-white, with fine 
reddish striz. (Quoy.) Quoy and Gaimard figure the animal, and 
give a short account of its anatomy. 
S. inermis, Sowerby; Thes. i, f 12. Shell ovato-acute; whorls 
6, rounded ; widely spirally striated; body whorl slightly flattened in 
the centre; sutures deeply excavated; pale brownish, longitudinally 
streaked with reddish-brown. 
Length, 1°6; breadth, 1'1 ; angle of spire, 62°. 
Very rare south of Cook Strait, not uncommon in the north. 
S. tricarinata, Lesson; Ann. ad. Se. Nat., Series 2, Vol. 
16, ~. 256. Shell ovato-oblong, very finely transversely striated, 
yellowish-brown, without marks; whorls 6, large, depressed in the 
middle, girdled in the depression with two grooves; the first keel 
salient, with a row of small nodules; lip thick, white and brown. 
Height, ‘87 inch ; breadth, °55 inch. 
The suture is not deep. (Lesson.) 
South Island of New Zealand. 
Lesson considers this as quite distinct from S. zodulosa and-from SS. 
crenulata. 
FAMILY—TRICHOTROPID. 
Lingual teeth in seven series (3.1.3); the central hamate and den- 
ticulated, the lateral curved, the inner denticulated, the two outer simple. 
Rostrum broad and short ; tentacles wide apart, bearing the eyes on 
swellings at the extremities of their lower halves. Mantle enclosed, with 
a rudimentary siphonal fold. Foot small simple. Operculum  sub- 
annular, ovate, horny, with a sub-lateral nucleus. Shell spiral, more or 
less turbinate ; whorls covered with an epidermis ; aperture sub-emargi- 
nate anteriorly ; columella not plicate. 
