Ending in a train, a pricked ballon,

Then, in the mid 1860s, the crinoline began to slip to the back of the skirt, leaving the front more or less straight,and in 1868 there was a further change, the reinforcement of the skirt having slipped entirely to the back and being indeed no more than a half-crinoline. There was a mass of material at the back, ending in a train, and when the crinoline was removed altogether, towards the end of the sixties, this was looped up into a kind of bustle, the characteristic of the next decade. The crinoline, in fact, having served as a symbol of the Second Empire, collapsed with it like a pricked balloon. In the street it was the fashion for younger women to wear a shorter skirt, which could be looped up by means of strings to reveal a skirt underneath, but this was a very temporary fashion, the skirts of the Seventies being excessively long and trailing.

I am confused words which is written in bold in the paragraph. could you make them clear what means exactly they are. thanks.