Branchiostoma in A Sentence

    1

    Branchiostoma Costa, having paired sexual organs (gonadic pouches); 2.

    2

    Costa, who named the genus Branchiostoma, and it has since been dealt with by many writers.

    3

    The Peruvian species, Branchiostoma elongatum, with nearly eighty myotomes, cannot at present be assigned to its proper subgenus.