Fig. 19.— Head of Filaria restiformis. Enlarged. Leidy’s original figure. 
Fig. 20. — Tail of F. restiformis. Enlarged. Leidy’.s original figure. 
Fig. 21. — Figure of type specimen of F. restifoimiis. Natural size. Original. 
Fig. 22. — Enlarged view of head of same: the body is surrounded by a distinct cuticle {cut.): cuticle 
of esophagus {cut. es.): esophagus (es.); blind intestinal sac (f.); lumen of esophagus {lum. cs.): a 
pair of lateral papillae {1. p.) and two submedian papillae {sulm.p.) are visible; the mouth is ter- 
minal {m.). Original. 
