In addition to the foregoing industries, there is another of almost equal importance—that of the pearl and pearl-oyster fishery.
The best mother-of-pearl is also obtained from the shells of the pearl-oyster.
The pearl-oyster is a large mollusk, the shell weighing sometimes as much as eight pounds.
It proved to be a pearl-oyster, as Max had supposed, and on being opened was found to contain eleven seed-pearls.
The iridescent nacreous inner layer of several species of shells, especially the "pearl-oyster" (Meleagrina margaritifera).
In the other hand he bore a kind of clapper formed of two pearl-oyster shells, beautifully polished.
It is not likely, however, that the manta devours anything larger than the pearl-oyster itself.
In short, this was not the pearl-oyster bed which had brought the two friends the greater part of the way around the globe.
Pliny says the dew-or rain-drops fall into the shells of the pearl-oyster when it gapes.