Note 2006 — BOOK XXI. AN ACCOUNT OF FLOWERS, AND THOSE USED FOR CHAPLETS MORE PARTICULARLY.
John Bostock translation
“Doubly-dyed,” or “twice dipped,” in purple. See B. ix. c. 63. Littré remarks here that, according to Doctor Bizio, it was the Murex brandaris that produced the Tyrian purple, and the Murex trunculus the amethystine purple.