Complex sentence: Another, lengthier, penny part serial was published by Lloyd from 1847/8, with 92 episodes and published in book form in 1850 as The String of Pearls "with the subtitle" The Barber of Fleet Street.
Split into simpler sentences: Another, lengthier, penny part serial was published by Lloyd from 1847/8, with 92 episodes. It was then published in book form in 1850 as The String of Pearls, "subtitled" The Barber of Fleet Street.