AMPHIBOLID&. 25 
FAMILY—AM PHIBOLID. 
Radula tongue shaped, teeth in curved transverse lines. Central 
tooth cuspidate at the sides, lateral uncinated. Pulmonary opening on 
the right side. Sexes united. . Tentacles two, small, flattened, triangular. 
Eyes sessile at the base of the tentacles. Shell with a horny operculum. 
Genus, AMPHIBOLA—Schumacheyr. 
Shell sub-globose, solid, rugose, umbilicated; spire depressed ; 
aperture semicircular; columella flattened and reflected, outer lip with 
a posterior sinus. 
Australia. Polynesia. 
A. avellana, Chemnitz; Gray, Dieff. N.Z, ii., p. 248; Wood- 
ward's Manual of the Mollusca, pl. 9, f. 335 Chenu, f. 3575. Sub- 
orbicular, rather thick ; whorls angled and flattened behind, transversely 
rugosely plicate ; spire very short. Yellowish or reddish brown, gener- 
ally more or less purple on the spire and keel; interior brownish purple; 
mouth white. 
Axis, ‘8; breadth, -g5. 
Auckland to Dunedin. New Caledonia (Cox. Exchange list, p. 37). 
Quoy makes two varieties. A larger, 1 inch g lines in diameter with 
the spire less pointed, strize shallower, and the interior a deep purple, 
passing after death into brown ; and a smaller, 11 lines in diameter, 
rougher, spire more pointed, and yellowish in color. For the anatomy 
of this species see Hutton A. N. H., 1879, series 5, vol. 3, page 181. 
A. quoyana, ote: ¢t ee Galerte des Mollusques, 1838, 
p- 288, pl. 1,28, f 17-18. This species resembles A fragilis, Q. and G., 
but is smaller, smoother, and painted with zig-zag brown lines. Its 
length is 8 lines. It is common in S. Australia, and is found all up the 
east coast of Australia as far as Brisbane (see MacGillivray, Voy. Rattle- 
snake, 11., p. 362.) ‘Tenison-Woods also quotes it from Tasmania. ‘The 
New Zealand habitat must, I think, be an error. Fora drawing of A. 
fragilis, see Chenu, f. 3576. 
FAMILY—SIPHONARIID:. 
Radula broad, rather long ; teeth numerous, equal, in slightly arched 
transverse lines ; central tooth narrow, elongated, with a small rhombic 
apex; lateral teeth larger, diverging, gradually diminishing in size 
outwards. Head with a large frontal disc, bilobed in front, and formed 
by the expanded tentacles ; eyes sessile on the outer side of the disc. 
Respiratory orifice covered by a large fleshy lobe of the mantle; a gill 
in the pulmonary cavity. Shell conical, patelliform, with an internal 
groove on the nght side. No operculum. Marine. 
Genus, SIPHONARIA —Blainville. 
Apex sub-central, posterior ; muscular impression horse-shoe shaped, 
divided on the right side by a deep siphonal groove, which produces a 
slight projection on the margin. 
