Habitat: Southern Australia and Tasmania.
(4) D. muelleri.—Scales in 17 rows; 118 ventrals; 38 subcaudals.
Colour grey-brown; lips and chin with yellow spots; belly grey.
Total length, 292 millimetres; tail 52.
Habitat: Queensland.
(5) D. frenata.—Scales in 19 rows; 167 ventrals; 35 subcaudals.
Colour olive-brown; upper lip yellow; belly white.
Total length, 390 millimetres; tail 54.
Habitat: Lake Elphinstone, Queensland.
(6) D. ramsayi ([fig. 54]).—Scales in 15 rows; 164 ventrals; 51 subcaudals.