???
All but the one that looks like a spinal column have descriptions as I see it.
I looked again (HT2-TL photo gallery); nope, still no descriptions. So I refreshed the page, and now the site is completely screwy with no pictures and the text is all over the place! Hmmm, maybe it's my browser (IE 8 )? Tried shutting down browser and restarting, still all messed up. Funny that other sites, including this one, come up fine.
PS - Just did a complete reboot and the Salk site still comes up a mess.
PPS - Waited a couple of hours and tried again; site now looks normal except now in the SongTower gallery only some of the pictures enlarge when you click on them, the others stay small (they do have descriptions, though). Still no descriptions in the HT2-TL gallery.