A Kyrielle is a French form of rhyming poetry written in quatrains (a stanza consisting of 4 lines), and each quatrain contains a repeating line or phrase as a refrain (usually appearing as the last line of each stanza).
A Ottava Rima is a poem written in 8-line octives. Each line is of a 10 or 11 syllable count in the following rhyme:
one octive poem .abababcc
two octive poem. abababcc, dededeff
three octive poem. abababcc, dededeff, ghghghii