Assertion: argonaut's shell | /r/HasProperty | an egg case
Facets:
value: truly
type: OTHER
Source sentences:
text: Its shell is not a true shell manufactured within an internal shell sack (as in other mollusks), but is rather an egg case secreted and delicately assembled by the female.
text: The paper-thin calcareous shell of the female argonaut is truly an egg case.