Cestraciontidæ (sestrasiontide)

pl. [NL., oblique rows which vary in form and character, and form the basis of the division into genera; there is no nictitating membrane. It contains the Port Jackson sharks. See shark. Also called Hetero don tid a. cestraphoran (ses-traf'ō-ran), a. and n. I. a. Of or pertaining to the Cestraphori; cestraciont. II. n. A member of the Cestraphori ; a cestraciont.