Haasiophis to that possessed by "Pachyrhachis". Both femurs are preserved with the specimen, but the rest of the right leg is missing. The left zeugopodium, tarsus, tibia, and fibula are preserved though the tibia is disarticulated slightly. The foot is composed of three tarsal ossifications and five metatarsals. The tarsal ossifications do not show signs that the bones were connected to each other during life. Traces of two phalanges are discernible behind metatarsals two and three. Several of the skeletal characters of "Haasiophis" may be interpreted as indication of "Haasiophis" being a juvenile specimen of "Pachyrhachis". The small overall size, underdevelopment
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,