Craniate with well-defined heads, thus excluding members of the chordate subphyla Tunicata (tunicates) and Cephalochordata (lancelets), but including Myxini, which have cartilaginous skulls and tooth-like structures composed of keratin. Craniata also includes all lampreys and armoured jawless fishes, armoured fish, sharks, skates, and rays, and teleostomians: spiny sharks, bony fish, lissamphibians, temnospondyls and protoreptiles, sauropsids and mammals. The craniate head consists of a brain, sense organs, including eyes, and a skull. In addition to distinct crania (sing. "cranium"), craniates possess many derived characteristics, which have allowed for more complexity to follow. Molecular-genetic analysis of craniates reveals that, compared to less complex
What You Have Left one since the pilot." Teresa L. of TV Fanatic rated the episode 4 out of 5 stars and stated, "Slow and somber, 'What You Have Left' was gently moving and highly intriguing. The episode matched others in its pacing, but the cliffhanger ending was a good change for the show." The episode was watched by 1.81 million viewers, marking the series lowest ratings to date. What You Have Left "What You Have Left" is the sixth episode of the American television drama series "The Killing", which aired on May 1, 2011 on AMC in the United States. The episode was