I have said this over and over again and I will continue to do so. Even experts have been poisoned. Few of all the mushrooms in the world are poisonous. Few poisonous mushrooms taste good enough to eat but it happens enough to where you just don't want to go around eating unknown mushrooms. Now beyond that, it is difficult in the extreme for a knowlegeable person to identify a species from a few dried specimens, next to impossible to do so from a picture on the internet. I will tell you that those do indeed look like one of a handful of psychoactive mushrooms and the fact that they are saved, in a bag and they are not epicurian sorts of mushrooms would indicate that they are what you hope - but, BUT, you don't know do you? could be someone just put some LBMs in a bag. Odds are great that even if you did eat them and didn't get high you would not get sick. Might be that you do get high, do you want your trip guided by the notion that maybe one of them is different from the rest and you are, while you are high - destroying your liver? Wow, what a great trip.
I have personal experience with such a thing. I recounted that I once got a professionaly canned can of mushroom pieces. We had been eating them for some time when I encountered some information about canning mushrooms - and the fact that the PH of mushrooms is conducive of Botulism toxin. We didn't want to dump those mushrooms and ate them anyway - and of course, after we felt some stomach cramps we spent the next 7 hours considering that we might have consumed enough toxin to kill us - a great great time for the whole gathering. Of course we were wrong but you really don't want to take something that is supposed to be magic that has any sort of a cloud over it. (those mushrooms look right but they also look like galerina - a deadly poison mushroom that grows near the good ones and looks quite similar even to the trained eye) If you really want to eat mushrooms, then do your research, spend a few dollars, put forth some effort and grow your own, they will be something you can depend upon and they will be as delightful as you imagined them to be - no botulism, no galerina, no worries.