Birastrop

Birastrops were a race of short insectoid beings. They had six spindly arms and a chitinous carapace which they could shed at will. Birastrop morality allowed killing for medical research. (PROSE: Where the Heart Is)


 * The Doctor met the same Birastrop on two occasions one thousand years apart, perhaps indicating that they had very long lifespans.

Birastrop lungs were capabled of safely breathing in cyanide. Dr. Mehendri Solon obtained Birastrop lungs and put them in Morbius' body. (TV: The Brain of Morbius)