Tough!
Wow, I thought I wouldn't have that much problem with this, but damn, I just couldn't seem to remember them! There are some I completely recongnize but just can't put my finger on what they are, such as 2, 7, 15. I'm pretty sure I know about 3 or 4 of them. I'd recommend a bit different, or larger sampling on some of them, as they are distinct enough to get any kinda idea at all. Fun though :)