 Like the United Kingdoms's first stamps, the design does not include the country name.The unusual name derives from the ornamental value figures inside the oval settings, and the arrangement of the stamps in the sheet, which permitted se-tenant pairs that looked like a pair of bull's eyes.The unusual naming of Brazilian stamps continued with the later issue of smaller, but rectangular designs, which were nicknamed "snake's eyes", and the issue of similar designs to the Bull's Eyes, but smaller, of which the blue were called "goat's eyes", and the black, "cat's eyes".