https://adlayasanimals.files.wordpress.com/2015/01/u2byv.jpg
Also, I got interested and tried to find some documentation on Portia Labiata after reading Watts' book, and there's very, very little, but what he says appears to be true. They do have telescopic eyes with vibrating retinas. They do spend ages painstakingly scanning a scene before moving. They are absurdly intelligent for insects. I don't know if Watts' suggestion that they timeshare pattern-matching areas of their brains is true, but it seems plausible.
Here's a good article: http://www.dichotomistic.com/mind_readings_spider%20minds.ht...