Turritella. MOLLUSCA. PECTINIBRANCHIA. 80S 
Length 2 i inches ; white, purple, or variegated with brown ; whorls raised, 
deeply divided by the separating line. Lister seems to have been acquainted 
with this shell as British ; afterwards Da Costa obtained it from the coasts of 
Lincoln and Lancashire ; Montagu received it from Kent. 
216. T. duplicata. — - Whorls about fourteen, and spirally 
striated, with two acute spiral ridges. 
Buccinum crassum. List.' An. Ang. 160. t. hi. f. 7* Conch, t. Dxci. 59.~.. 
Turbo dup. Linn. Syst. i. 1239. Penn. Brit. Zool. iv. 129. t. Lxxxi. f. 
112. Don. Brit. Shells, t. cxii. Turton.^ Conch. Diet. 216 — English 
coast, rare. 
Length about 2 | inches, thick, heavy, of a brownish colour ; the two ridges 
are of unequal size — This species was obtained by Lister from the Scar- 
borough fishermen ; and Dr Turton announces that it was said to have been 
lately discovered on the western coasts by Dr Leach.” 
217. T. suhtruncata. — Whorls about seven, rounded, and 
obscurely striated spirally. 
Turbo sub. Mont. Test. Brit. 300. t. x. f. 1. — In sand, rare. '■ 
Length about j^ths of an inch ; white ; whorls from five to seven, and (in 
a specimen in my possession) gradually tapering to an obtuse point ; outer lip 
rounded ; pillar-lip nearly straight, a little reflected, so as to form a small ca- 
vity behind. 
218. T. elegantissima. — Whorls about ten, flat, with numer- 
ous regular transverse grooves. 
Turbo turritus novem anfractibus striatis apertura rotunda, Walk. Test. 
Min. ii. t. ii. f. 39. — Turbo eleg. Mont. Test. Brit. 298. t. x. f. 2.— In 
deep water, not common. 
Length about t^iks of an inch, breadth about |th of its length ; colour of 
the shell white, glossy ; of the epidermis brown ; ridges and grooves rounded, 
slightly oblique, separating line distinct ; outer lip slightly rounded ; pillar- 
lip nearly straight, thick, forming a slight angle anteally. It is a very strong 
shell in proportion to its size. 
219 . T. truncata. — -Whorls four or five, flat, decreasing sud- 
denly ; apex abrupt. 
Turbo trun. Mont. Test. Brit. 300. t. x. f. 7 — Common. 
Length about ^%ths of an inch ; white, glossy ; whorls nearly six in num- 
ber, deeply divided by the separating line, and faintly striated transversely ; 
aperture ovate ; pillar-lip slightly rounded, and a little reflected. 
220. T. unica. — Whorls nine, finely striated spirally, tvith 
numerous undulated transverse ridges. 
Turbo turritus septem anfractibus strigatis apertura ovali. Walk. Test. 
Min, ii. t. ii. f. 40 — Turbo unicus, Mmt. Test. Brit. 299. t. xii. f. 2 — 
Among shell-sand, rare. 
Length about 3 ^* 5 ths of an inch ; white, glossy, slender ; whorls rounded and 
deeply divided by the separating line ; aperture ovate ; the pillar-lip rounded. 
221. T. simillima. — Whorls eight, with fourteen distant 
ridges parallel with the axis of the shell. 
Laskey^ Mont. Test. Brit. Supp. 136. Wern. Mem, i. 406. t. viii. f. IS. 
— Shores of Jura. 
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