Sentence:  ... the prodigious variety of ſo many kinds of verſe, Leonine, Alexandrine, Acroſtic, Chronologic, Hieroglyphic, <WSD>Cancrine,</WSD> Croſs-formed, Labyrinthic, Pyramidal, and a thouſand other follies ... 
Meaning of the word marked with <WSD> tags:  Palindromic; reading the same forwards or backwards.