Trochus

Definition and stakes

George Brettingham Sowerby II,  A Conchological Manual — Conchological Manual (1842)

“ Ex. Natica Mamilla, Auct. fig. 327.
MAMMILLATED. (Mammula, a little teat.) A term applied to the apex of a shell when it is rounded like a teat. Ex. Voluta Vespertilio, fig. 433.
MARGARITA. Leach. (Margarita, a pearl.) A genus of small shells resembling the genus Trochus, from which it differs in having an operculum consisting of few whorls. M. tæniata, fig. 362. Mr. G. B. Sowerby, sen. has enumerated 15 species in a list accompanying the figures published by the author of this manual in Nos. 132 to 134 of his Conchological Illustrations.
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Source: Wikisource

George Brettingham Sowerby II,  A Conchological Manual (1842)

“ The size of the operculum is distinguished by comparison with the rest of the shell; thus, those of Strombus, Cassis, &c. are small; while those of Cyclostoma and others are large, filling up the cavity at its outer edge.
The direction in which the successive layers are deposited, forms another ground of distinction. The disc is formed in some instances of a series of whorls, the apex or nucleus being more or less central; if these whorls are numerous, the operculum is described as multispiral, as in shells of the genus Trochus; if few, as in Cyclostoma, it is paucispiral.
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Source: Wikisource

active 4th century Smyrnaeus Quintus,  The Fall of Troy

“ Far mightiest! If thine heart be brave indeed,
Of my spear now make trial in the strife."
On rushed he, as a lion against a stag,
Borne by the steeds and chariot of his sire.
And now full soon his lance had slain his foe,
Him and his charioteer—but Phoebus poured
A dense cloud round him from the viewless heights
Of heaven, and snatched him from the deadly fray,
And set him down in Troy, amid the rout
Of fleeing Trojans: so did Peleus' son
Stab but the empty air; and loud he cried:
"Dog, thou hast 'scaped my wrath! No might of thine
Saved thee, though ne'er so fain!
”
Source: Gutenberg

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