Poison-fangs followed by 5 small teeth. Snout short; nostrils superior, horizontal, between two nasal shields and an internasal; frontal and parietal shields large; præocular present. Body rather elongate; scales hexagonal, juxtaposed; no distinct ventral scales.
T. anomalus.—Body with dark annuli, wider on the back.
Total length, 810 millimetres; tail 84.
Habitat: Java.
(3) Acalyptophis.
Maxillaries longer than the ectopterygoids; frontal and parietal shields broken up into scales. Body rather elongate; scales subimbricate; no distinct ventrals.
A. peronii.—Greyish or pale olive, with dark cross-bands; belly whitish.
Total length, 890 millimetres; tail 115.
Habitat: Western Tropical Pacific.