headless mollusks and gastropods from the jurassic period, vintage engraving

ancient animal antique art artwork biology black clavellata conoidea drawing engraved engraving etching extant extinct fossil gastropod genus headless historic history illustration invertebrate jurassic marine mollusc mollusca mollusk natural nature old organism paleontology period picture pleurotomaria shape species spiral structure trigonia trigoniidae vector vintage white zoology