796 REPORTS ON THE STATE OF SCIENCE.—1913. 
only, not by the maxillaries and intermaxillaries. This is easily 
understood in the Cheloniide and allied turtles (Toxochelyid@) as the 
consequence of the formation of a secondary palate by the palatines 
(fig. 8, B). But in the Leatherback (fig. 3, A) there is no secondary 
palate, and the internal nares lie far forward in what seems to be a 
primitive position. The forward process of the palatines, that excludes 
the maxillaries and intermaxillaries from the border of the internal 
Fig. 3. A, Bones bordering the inner nares of Dermochelys and B of Toxochelys procax 
Hay. Fig. A about } nat. size, after Nick, 1912, pl. 1, figs. 1 and 3; Fig. B 
about 3 nat. size, after Hay, 1908, p. 176, fig. 225. 
1.V, lateral processes of the vomer in Dermochelys, excluding the premaxillaries 
from the border of the inner nares; Maz, maxillaries; Pal, palatines; Pal.Pr, 
forward process of the palatines in Dermochelys; Pal.R, ridge on the palatines in 
Dermochelys, perhaps representing Pal.sec, the secondary palate formed by the 
palatines in T'oxochelys ; Pm, premaxillaries ; Vo, vomer. 
nares in Dermochelys, is also present (not reaching the vomer, how- 
ever) in several primitive Testudinata, and Hay *° denies on this ground 
its value as a token of relationship of the Leatherback with the 
Cheloniida. However, the process in the Leatherback. is longer and 
reaches farther forward than in primitive Testudinata, is rather 
10 1905, p. 157. 
