R. bicolor.—Colour greyish-olive on the back, yellowish-white on the belly; tongue white.
Total length, 395 millimetres; tail 55.
Habitat: Australia.
(l) Brachyaspis.
Characters the same, but head distinct from the neck; eyes small, with vertically elliptic pupils; nostril between two nasal shields. Body stout, cylindrical; scales smooth, slightly oblique, in 19 rows. Tail short; subcaudals in a single row.
B. curta.—Colour uniform olive-brown; belly yellowish.
Total length, 490 millimetres; tail 70.
Habitat: Western Australia.