Assertion: bone | /r/CapableOf | become enveloped
Facets:
value: gradually
type: MANNER
value: to serve as a fin
type: PURPOSE
value: in thick membrane
type: OTHER
Source sentences:
text: The bones of a limb might be shortened and widened to any extent, and become gradually enveloped in thick membrane, so as to serve as a fin; or a webbed foot might have all its bones , or certain bones , lengthened to any extent, and the membrane connecting them increased to any extent, so as to serve as a wing: yet in all this great amount of modification there will be no tendency to alter the framework of bones or the relative connexion of the several parts.