13, 6, et libertinas arca flagellat opes; cf.
"Roman Society from Nero to Marcus Aurelius"
Samuel Dill
Green marls, often abounding in a peculiar species of oyster, and accompanied by Cerithium, Mytilus, arca, nucula, etc.
"The Student's Elements of Geology"
Sir Charles Lyell
arca rhombea, Born, Test.
"Sketches of the Natural History of Ceylon"
J. Emerson Tennent