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This genus is characterised by the maxillary bones extending forwards as far as the palatines, and bearing, in addition to the poison-fangs, 6–7 grooved teeth. The head is not distinct from the neck; the eyes are very small. The body is cylindrical, and covered with smooth scales in 17 rows. Tail short; subcaudal scales in 2 rows.

O. vitianus.—Snout elongate, pointed; 139–152 ventral scales; 27–38 subcaudals.

Colour dark brown, lighter on the sides; belly brown or white, more or less spotted with black; tail black.

Total length, 360 millimetres; tail 45.

Habitat: Fiji Islands.

Fig. 43.—Skull of Glyphodon tristis (Australian Colubrine). (After G. A. Boulenger, op. cit.)