Help with jellyfish species identification
Be warned that these are just best guesses - as you said yourself, these aren't great images for identification as they appear to be simple drawings:

1) this looks a lot like Aurelia aurita - though the lack of any internal patterning in the drawing makes me think perhaps otherwise.



image source: https://www.leisurepro.com/blog/wp-content/uploads/2017/05/shutterstock_272438348.jpg, https://holidays-majorca.co.uk/wp-content/uploads/2017/01/Aurelia-Aurita-S-300x225.jpg

2) possibly a Turritopsis dohrnii or nutricala - if so then this is the 'immortal' jellyfish. shape of bell is correct and the lappets seem reasonably close, it's just the internal structures that I'm not sure about.


image source: https://www.cairnsholidayspecialists.com.au/shared_resources/media/irukandji-jellyfish-in-far-north-18836_400x322.jpg

3) Very unsure about this one, but potentially a Atolla wyvillei? definitely has some visual features in common and I can't find anything else that's similar. I can also see how an artist would derive that image from this species.



Image source: https://www.mindenpictures.com/cache/pcache2/90194947.jpg, https://c8.alamy.com/comp/E45A4H/deepsea-medusa-jellyfish-atolla-manubrium-gulf-of-maine-atlantic-E45A4H.jpg

I hope these at least give a starting point and are of some help, I think the nature of those images will make it hard to get many better answers. Good luck!!