MOSCOW -- Russian police have dispersed small anti-Kremlin rallies and detained several dozen protesters.

Police said 80 people were detained in Moscow and eight in St. Petersburg, Russia's second-largest city, on Thursday. They included Eduard Limonov, leader of the outlawed National Bolshevik party, who was detained up in Moscow's Triumphalnaya Square.

At both rallies protesters wore white ribbons – a common artifact during anti-Kremlin demonstrations – and chanted "Shame!" and "Russia Without Putin!" in reference to President Vladimir Putin.

Over the past two years, similar opposition rallies have been held in each month that ends on the 31st. That's a nod to the 31st Article of the Russian constitution, which guarantees the right of assembly.

Russian authorities often deny permission for demonstrations.

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  • Russian riot policemen detain an elderly oppostion activist in central Moscow on May 31, 2012, during an unauthorized rally to defend Article 31 of the Russian constitution which guarantees freedom of assembly. (ANDREY SMIRNOV/AFP/GettyImages)

  • Russian riot policemen detain an oppostion activist in central Moscow on May 31, 2012, during an unauthorized rally to defend Article 31 of the Russian constitution which guarantees freedom of assembly. (ANDREY SMIRNOV/AFP/GettyImages)

  • Police officers detain an opposition activist during a banned anti-Kremlin protest in St.Petersburg, Russia, Thursday, May 31, 2012. Opposition groups have been calling rallies on the 31st day of each month to honor the 31st article of the Russian Constitution, which guarantees the right of assembly. (AP Photo/Dmitry Lovetsky)

  • Police officers detain St.Petersburg's leader of opposition Garry Kasparov's United Civil Front party, Olga Kurnosova during a banned anti-Kremlin protest in St.Petersburg, Russia, Thursday, May 31, 2012. (AP Photo/Dmitry Lovetsky)

  • An opposition activist his mouth sealed with tape reads "shut up" during an anti-Kremlin protest in Moscow, Thursday, May 31, 2012. (AP Photo/Alexander Zemlianichenko)

  • Police detain an opposition activist, with the white ribbon as a symbol of protest, during an anti-Kremlin protest in Moscow, Thursday, May 31, 2012. (AP Photo/Alexander Zemlianichenko)