Barnes was a lively presence in the Dolphin back-line in their 16-16 draw with Old Belvedere in the Ulster Bank League last weekend.
Hurley injured his right knee against Aironi and will undergo a scan this evening to find out the full extent of the injury. It is expected that the Meath man will be out of action for a number of weeks.
The province's squad trained this morning in Cork IT and will have their second weekly session tomorrow in the University of Limerick.
MUNSTER Squad (v Newport Gwent Dragons) - Backs (12): Johne Murphy, Doug Howlett, Danny Barnes, Lifeimi Mafi, Scott Deasy, Sam Tuitupou, Simon Zebo, Declan Cusack, Paul Warwick, Peter Stringer, Duncan Williams, Conor Murray.
Forwards (17): Wian du Preez, Damien Varley, Tony Buckley, Denis Fogarty, Marcus Horan, Stephen Archer, Darragh Hurley, Peter Borlase, Dave Foley, Ian Nagle, Mick O'Driscoll, Billy Holland, Donnacha Ryan, Tommy O'Donnell, James Coughlan, Alan Quinlan, Denis Leamy.