Dinosaur Jr.: J. Mascis (vocals, guitar, percussion); Lou Barlow (vocals, bass, Casio); Murph (vocals, drums, casio).Dinosaur Jr.‘s first album, entitled DINOSAUR, is a generally overlooked artifact of the band’s sizeable catalog. In fact, it’s so often ignored that many assume the group’s groundbre­aking second release, YOU’RE LIVING ALL OVER ME, was actually the debut. Nevertheless, DINOSAUR is an ambitious collection of speedy, fuzzed-out, guitar-driven songs that scream with urgency. Most importantly, however, it offers an honest glimpse into the early years of one of alternative rock’s founding fathers.Guitar innovator J Mascis and bass-mangling cohort Lou Barlow take the listener on a brief foray into dark indie-metal on tracks like “Bulbs of Passion” and “Mountain Man,” providing stark contrast to the more lo-fi pop specimens “Forget the Swan” and “Quest.” Most songs race by at a rate faster than a punk-rock basement jam session. Overall, it’s a portrait of a band on the verge of greatness. DINOSAUR is not for the faint of heart, but will justly reward the patient patron.