Acteon. MOLLUSCA. TORNATELLADJE. 337 
6. T. elongatus. — Elongated, obtuse, spirally striated ; the last whorl near- 
ly cylindrical ; aperture short, narrow above ; lip expanded ; pillar without 
plait A. elon. Sower. Min. Conch, t. cccclx. f. 3 — London clay — This shell 
is surely out of place in the present group. 
Gen, LXX. ACTEON. — Body lip toothed ; separating line 
simple. 
302. A. denticulatus. — Whorls seven or eight ; body lip with 
t wo folds ; outer lip denticulated within. 
Voluta dent. Mont. Test. Brit. 234, t. xx. f. 5.— On sea-weed near high 
water-mark, England. 
Length half an inch, breadth not a quarter ; horn colour ; body whorl 
large, slightly rounded, the others forming a conical subproduced spire, all 
slightly wrinkled by the lines of growth ; aperture oblong-oval, half the 
length of the shell ; the body lip has one tooth less in size than the two on 
the pillar ; the teeth in the outer lip vary in number, and in some young in- 
dividuals are absent. The Voluta ringens and rejiexa of Dr Turton (Conch. 
Diet. 251.) appear to be only varieties of A. denticulatus. 
303. A. hklentatus. — Whorls six or seven ; body lip with 
one tooth ; outer hp simple. 
Voluta bid. Mont. Test. Brit. Sup. 100. t. xxx. f. 2 — At Dunbar, Mr 
Laskey ; Devonshire, Mr Montagu. 
Length a quarter of an inch ; white ; strong, thick, conic, wrinkled by the 
lines of growth; body whorl about two- thirds, and the aperture about half 
the length of the shell ; the last is narrow retrally ; with the inner lip thick- 
ened and reflected. 
304. A. triplicatus. — Whorls six, flat ; body lip with two 
folds ; outer lip simple. 
Voluta trip. Don. Brit. Shells, t. cxxxviii, Mont. Test. Brit. Sup. 99. 
— Guernsey. 
Length half an inch ; ovate, smooth, chesnut-brown ; the body whorl oc- 
cupying three-fourths of the shell ; aperture contracted retrally ; the whorls 
of the conical spire are so flat as to be distinguished only by the separating 
line. 
305. A.Jusvfbrmis. — Whorls four, flat, inner lip with a gib- 
bosity in the middle. 
Voluta fus. Turt. Conch. Diet. 251 — Exmouth, Mrs C. W. Luscombe. 
“ Shell glossy white, transparent, quite smooth, swollen in the middle, and 
tapering to both ends ; spires four, very flat, and only defined by a fine lucid 
circular line, the first very large and occupying more than three-fourths of 
the shell, inflated in the middle and tapering towards the base, which is 
rounded and a little reflected ; aperture oblong-oval, reachipg to the top of 
the primary volution ; the outer lip very thin and plain ; pillar lip smooth, 
not spreading nor reflected, without teeth or folds, but furnished with a small 
oblique gibbosity in the middle : length of an inch ; breadth half its 
length.” — Probably the type of a new genus. 
306. A. heteroclita. — Whorls reversed. 
Voluta heteroclita, Laskey^ Wern. Mem. i. 398, t. viii. f. 1, 2. Mont. Test. 
Sup. 169 — Dunbar. 
Y 
