Note 15 — ADAM SEDGWICK, M.A., (continued 3)
Reading edition
This groove is the only structure which it seems possible to compare with the so-called primitive groove of Birds. It is, however, doubtful whether they are really homologous.
Reading edition
This groove is the only structure which it seems possible to compare with the so-called primitive groove of Birds. It is, however, doubtful whether they are really homologous.