In the Pablo Neruda poem "Waltz," the poet relates his seaborne plight this way: "My mouth is full of night and water/The abiding moon determines what I do not have/What I have is in the midst of the waves, a ray of water, a day for myself, an iron depth." The metaphorical workings of a crosstide -- rough waves surrounding calm water -- aren't within reach. Chances are the music of the Portland, OR, quintet that took its name from that poem would also be out of reach for Neruda, but West Coast emo-pop followers find much to relate to in the band. Formed in the late '90s, Cross...