Ascaridæ.
Strongylidæ.
Trichinidæ.
Filaridæ.
Mermithidæ.
Anguillulidæ.
II. Gordioidea.
III. Chætosomoidea.
[154] The ova of Anguillula aceti are stated by Hallez to undergo a similar development to those of Cucullanus.
[155] The following facts are mainly derived from Leuckart’s exhaustive treatise (No. [388]).