Hi Hilary,
There are two marriages and a death for girls with the name of Roope but no definite proof of who their parents are. However it is a very uncommon name so the chances are that they belong to your couple. You would need death records which have parents name to prove same, or copies of marriage certificates. If you look under the married names for a death on the index you might find the correct parents names have been given. When the births were registered they obviously hadn't decided on the child's name
ROOPE, Frances Amy CM 846283 Age: 27 Marriage
Spouse: GANT, Tetley Age: 29
Marriage Date: 19 Jul 1882
Reg Year: 1882 Reg State: Tasmania
Ref Number: 302
ROOPE, Lydia Laura CM 846285 Age: 21 Marriage
Spouse: REEVE, James William Age: 38
Marriage Date: 04 Feb 1873
Reg Year: 1873 Reg State: Tasmania
ROOPE, Alice CD 768420 Death
Sex: Female
Age at Death: 11
Death Date: 08 Jan 1860
Reg Year: 1860 Reg State: Tasmania
Ref Number: 1866
ROOPE, Lavington CD 768423 Death
Sex: Male
Age at Death: 60
Death Date: 29 Jun 1881
Reg Year: 1881 Reg State: Tasmania
Ref Number: 3197
ROOPE, Lydia Tidmarsh CD 768424 Death
Sex: Female
Age at Death: 40
Death Date: 08 Sep 1864
Reg Year: 1864 Reg State: Tasmania
Andcarred