Hi Margaret,
Your locations are associated with the current-day parish of Templenoe, County Kerry, near the town of Kenmare.
Rural Irish parishes are composed of TOWNLANDS, which are the smallest divisional area names in rural Ireland. Townlands often cover an area of a few square miles, and are the residence of a number of farming families. The farms are accessible by roads named after the townlands they traverse or the villiage where they terminate. There are no street-names involved in addressing in the rural areas.
There are no postocdes, but those are planned for introduction in the next few years.
Some of your places are the names are townlands in Templenoe.
Others are placenames of olden times that were subsumed into other townlands. Some of those placenames have survived in informal current-day usage, some have not.
Coumaduneen and Coumadireen: Two spellings of the same place, I expect. This is not a townland name but I believe the area name is still in current use to refer to an area in Templenoe. Someone from Templenoe would be able to confirm. "Coum" is an Irish word referring to a hollow on a mountainside.
Lacka: This is a current-day townland in Templenoe
Shauntore and Shanacnuck: This is what drew my attention to your post. I have ancestors associated with those places and was searching for references. My ancestors from there were definitely associated with Templenoe, but I've checked with a Templenoe historian and the names are not in current usage. My theory is that they are located in the mountains at the north end of Templenoe. "Shan" is the Irish word for old and "cnuck" is the word for hill.
The Hallisey and Casey family names are associated with the area and there are some families of that name in the Kenmare region today. I have read quite a few of the baptism records, and I think it unlikely that Margaret Casey and Mary Casey were the same person mistakenly named. I think its more likely that Thomas Hallisey remarried or that there were two different Thomas Hallisey men.
Hope this is useful.
Mike