a suspension when approached by a skip in an upward
direction, as in Fig. 119.

[Illustration: Fig. 119.]

This species may also be written in triple rhythm. [Fig. 120.]

[Illustration: Fig. 120.]

The cadences in Fig. 121 are good, as well as those of the second species.

[Illustration: Fig. 121.]

EXERCISES

To cantus firmus _a_ write fourth species in one part. Write three
settings, as usual.

To cantus firmus _b_ write fourth species in one part in triple rhythm.
Write three settings, as above.

To cantus firmus _b_ write second species in one part and third in the
other. [Fig. 122.]

[Illustration: Fig. 122.]

CANTI FIRMI

[Illustration: Fig. 123.]

LESSON XVIII

FOURTH SPECIES (Continued)

EXERCISES

Write two eight-measure phrases, using the fourth species mixed in all
parts. [Fig. 124_a_.]

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

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.

CANTI FIRMI

[Illustration: Fig. 127.]

LESSON XX

FIFTH SPECIES (Continued)

EXERCISES

To cantus firmus _a_ write second species in one part and fifth in the
other. [Fig. 128_a_.]

To cantus firmus _b_ write third species in one part and fifth in the
other. [_b_.]

To cantus firmus _c_ write fourth species in one part and fifth in the
other. [_c_.]

To cantus firmus _d_ write fifth species in two parts. [_d_.]

[Illustration: Fig. 128.]

CANTI FIRMI

[Illustration: Fig. 129.]

LESSON XXI

COMBINING THE VARIOUS SPECIES

EXERCISES

Write one eight-measure phrase each, of the following combinations: (1)
2nd, 3rd and 4th species (Fig. 130a); (2) 2nd, 3rd and fifth species (_b_)
(3) 3rd, 5th and 5th species (_c_); (4) 2nd, 4th and 5th species (_d_); (5)
4th, 5th and 5th species (_e_).

[Illustration: Fig. 130.]

LESSON XXII

FIFTH SPECIES IN ALL PARTS

EXERCISES

Write five eight-measure phrases with fifth species in all parts, making
use of imitation at the beginning as in Fig.