JG,
Can you post some closeups of them somewhere so we can take a look? The Echino in fromt looks alot like my E. chloranthus v cylindricus, but also from this distance looks like E. englemannii. Do you know that the mix was only Echinocereus? The one at 4:00 looks a little like Carnegiea gigantea (which is usually in any cactus mix).
Dan
Lincoln, NE USDA 5

Dan,

These were all from an echinocereus species mix and not a general cactus mix. I have cropped from the original photo to get "closeups" since I can't take any more photos just now.

6 o'clock
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4 o'clock
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3 o'clock
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And this one was hidden at 12 o'clock in that shot
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Hope these are good enough to get IDs.