r verses.

_Serventesios_ are strophes of four hendecasyllables, of which the
first rhymes or assonates with the third, and the second with the
fourth.

_Redondillas_ are strophes of four eight-syllable (or sometimes
six-syllable) verses which rhyme as follows: a b b a.

_Cuartetos_ are strophes of four hendecasyllables with the
rhyme-scheme a b b a. It is not customary to put a final word that is
_aguda_ in the uneven verses of compositions written in
hendecasyllables, or in verses that rhyme with them. Sometimes the
four verses are esdrujulos.

_Romances_, which are the most used of all forms, need not be written
in _cuartetas_. It is sufficient that the even verses be in assonance
and the uneven verses free. Romances, properly so called, are composed
of octosyllabic verses.

_Romancillos_ are romances composed of verses with less than eight
syllables.

_Romances heroicos_ are romances composed of hendecasyllabic verses,
all of which are _llanos_.

_Quintillas_ are combinations of five verses that have but two rhymes,
of which one occurs three times and the other twice. These verses may
rhyme at the will of the poet, provided that three verses having the
same rhyme do not follow each other successively. Of the possible
arrangements the following occur most frequently: a a b b a, a b b a
a, a b a b a, a b a b b.

_Sextinas_ are usually composed of six hendecasyllabic verses in which
a _serventesio_ is followed by a _pareado_.

The first, third, and fifth verses, however, may rhyme together, and
the second, fourth, and sixth.

There are also _sextinas_ which have the third and sixth verses with a
consonantal rhyme in words that are _agudas_, while the first and
second, and the fourth and fifth, form _pareados_.

In compositions written in _sextinas_ the succeeding strophes have the
same arrangement as the first.

Octavas:

_Octavas de Arte mayor_ are composed of eight dodecasyllables divided
into two equal hemistichs, with the accents on the second, fifth,
seventh, and eleventh syllables. The first verse rhymes with the
fourth, fifth, and eighth; the second with the third; and the sixth
with the seventh. Sometimes the second rhymes with the fourth, the
fifth with the eighth, the first with the third, the sixth with the
seventh.

_Octavas reales_ are strophes of eight hendecasyllabic verses
(_llanos_), of which the first six rhyme alternately and the last two
form a _pareado_.

When _octavas_ of th