Family 5. Blanjulidae.
Thin cylindrical body with more than 30 body rings. Eyes either absent or in a simple row beneath the edge of the forehead.
Fig. 22.—Blanjulus guttulatus. (From C. L. Koch, Die Myriapoden.)
Family 6. Chordeumidae.
Resemble the Polydesmidae (Fam. 7), but the head is longer and less rounded in the forehead. The antennae are placed more at the side of the head. Eyes small and numerous, in a cluster. Body rings always 30 (Fig. 16).
Family 7. Polydesmidae.
Body cylindrical, with a lobe or keel on the posterior part of the upper surface of the body ring. Always 19 body rings. No eyes.
Fig. 23.—Polydesmus collaris. (From C. L. Koch, Die Myriapoden.)