Total length, 510 millimetres; tail 95.
Habitat: Queensland, New South Wales.
(3) H. stephensii.—239 ventrals; 60 subcaudals.
Body barred alternately with black and white; the black bars are twice as broad as the white ones; head dark, spotted with yellow; a W-shaped yellow mark on the back of the head.
Total length, 760 millimetres.
Habitat: Port Macquarie, New South Wales.
(i) Tropidechis.
Same general characters; nasal shield entire; scales on the body strongly keeled, in 23 rows. Tail moderate; subcaudals in a single row.
T. carinatus.—Colour dark olive, with darker cross-bands; belly yellow, more or less tinged with olive-green.
Total length, 730 millimetres; tail 120.