The eastern mourning skink (Lissolepis coventryi), also known commonly as Coventry's spinytail skink and the swamp skink, is a species of lizard in the family Scincidae.

The specific name, coventryi, is in honor of Australian herpetologist Albert John Coventry.

[3] L. coventryi is found in the Australian states of South Australia, Victoria, and possibly New South Wales.

[2] The preferred natural habitat of L. coventryi is freshwater wetlands such as marshes and swamps.

[1] L. coventryi has an average snout-to-vent length (SVL) of 8 cm (3.1 in), with a long tail, which is almost one and a half times SVL.