Figure 1
From: Circadian rhythm and surface activity in soil-dwelling caecilians (Amphibia: Gymnophiona)
Photos of the three study species: (a) Ichthyophis longicephalus, (b) Uraeotyphlus cf. oxyurus and (c) Gegeneophis tejaswini. Arrows indicate position of eye (E: when visible externally), nostril (N) and tentacle (T).
