Note 44 — SYSTEMATIC AND DESCRIPTIVE PART. (continued 3)
Reading edition
The systematic affinities of these extinct genera are very obscure. Cope places them, with others (for instance Protosphyræna, which has a sword-like prolongation of the ethmoid), in a distinct family, Saurodontidæ: see “Vertebrata of the Cretaceous Formations of the West,” 1875.