We've had queries about this before - the theory that makes most sense to me is that it's from female frogs that are ready to spawn and have been eaten by herons - the unfertilised spawn is rejected by the herons.
However, if you want a laugh read some of the comments following this article
I found lots of dead frogs on the margins. Might they have died due to too many suitors, or maybe they just couldn't find a way out and died of exhaustion?
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I don't know Hosta but I have seen it on my grass
We've had queries about this before - the theory that makes most sense to me is that it's from female frogs that are ready to spawn and have been eaten by herons - the unfertilised spawn is rejected by the herons.
However, if you want a laugh read some of the comments following this article
http://www.bbc.co.uk/scotland/outdoors/articles/jelly/
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
Gosh you're good Dove.
It was down by the lake.
I found lots of dead frogs on the margins. Might they have died due to too many suitors, or maybe they just couldn't find a way out and died of exhaustion?
Mine must be star jelly I don't have a pond
but two doors down they have one and we often see the Heron 
Possibly Nostoc, aka Star Jelly, a gelatinous alga that appears in very wet weather. If so it will disappear when the weather gets drier.
http://www.downgardenservices.org.uk/bluegreenalgae.htm
https://en.wikipedia.org/wiki/Nostoc