AcTEON. MOLLUSC A. TORNATELLAD^. 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. Soiver. 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. denticulattis. — Whorls seven or eight ; body hp with 

 two 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 refiexa of Dr Turton (Conch. 

 Diet. 251.) appear to be only varieties of yf. denticulatus. 



303. A. bidentatus. — 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. 

 — Guernsej'. 



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.Jiis'rforviis. — 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, reaching 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 /oths of an inch ; breadth half its 

 length." — Probably the type of a new genus. 



306. A. heterocUta. — Whorls reversed. 



Voluta heteroclita, Laskey, Wern. Mem. i. 398, t. viii. f. 1, 2. Mont. Test. 

 Sup. 169 Dunbar. 



