Though Bay Area tenor saxophonist Mitch Marcus has established himself as a boundary-busting freak in the wildly experimental group Japonize Elephants, he's not afraid to see if he can play something meaningful within traditional jazz structures. On his quintet's second CD, Entropious, he leads his younger-generation band through a high-energy set of originals and a jumpin' take on Dizzy Gillespie's appropriately titled "Bebop Rollercoaster." The album's fresh arrangements of hard bop, breezy swing, and bop-spawned contemporary tunes place the dual saxophonists (Marcus and Sylvain Carton, also of Japonize Elephants) front and center, where they blow intricate, often lightning-paced melodies over a buoyant piano-bass-drums rhythm section. While tapping the wellsprings of both bop god Charlie Parker and his avant-garde descendant Eric Dolphy, the horn soloists evoke the genre's legacy without wallowing in easy retroisms. Smart, tasteful, hard-hitting, and eminently listenable, Marcus proves that the path to great jazz still stems from its stalwart past.