By Noel Randewich SAN FRANCISCO (Reuters) – A new anonymous Internet marketplace for illegal drugs debuted on Wednesday, with the same name and appearance as the Silk Road website shut down by U.S. law enforcement authorities a month ago. Like its predecessor, the new Silk Road listed hundreds of advertisements for marijuana, cocaine, ecstasy and other illegal drugs available for purchase from independent sellers using the anonymous Bitcoin digital currency. On October 1, the Federal Bureau of Investigation shut down the original Silk Road and arrested its alleged mastermind, Ross William Ulbricht, 29, known online as Dread Pirate Roberts, in San Francisco. It took the FBI two-and-a-half years to do what they did … but four weeks of temporary silence is all they got, a site administrator wrote, also using the Dread Pirate Roberts moniker.