Avisauridae leg formed by fused metatarsals (the bones which comprise the foot in humans). As a result, members of this family are distinguished from other enantiornitheans exclusively by features of the tarsometatarsal and pedal phalanges (toe bones). Unlike in some prehistoric birds, avisaurid tarsometatarsals were not completely fused, with the distal (outer) parts of the metatarsals being separate from each other. The proximal (near) half of metatarsal III (the long bone in the middle of the tarsometatarsus) is convex from the front. The inside edge of this bone's trochlea (toe joint) has a bony tab which points downward, known as a
Roll the Bones rated it as one of the band's best ever songs partly due to its different texture than the rest of the album. The band was optimistic about its musical form, but faced the problem of overworking its arrangement because all the parts sounded good to them. In the end, they learned that by stripping the song back resulted in a stronger track. "Roll the Bones" was named after a science fiction story by Fritz Lieber that Peart had read some fifteen years prior titled "Gonna Roll the Bones". Though the story had no influence on the music or its message,