To cantus firmus _b_ write third species in one part and fourth in the
other. [Fig. 124_c_.]

[Illustration: Fig. 124.]


CANTI FIRMI

[Illustration: Fig. 125.]




LESSON XIX

FIFTH SPECIES


[Illustration: Fig. 126.]

No suggestions other than have already been given for two- and three-part
counterpoint are necessary for this species.


EXERCISES

To canti firmi _a_ and _b_ write fifth species in one part. Write each
three times, as usual.