Editorial note — Part 1.-- Vertebrata. (continued 3)

In the frog the posterior nares open into the front of the mouth. In the dog the maxillae and palatines send plates down and in (the palatine plates) to cut off a nasal passage from the rest of the buccal chamber, and carry the posterior nares back to the pharynx, thus cutting the vomers off from the mouth roof. The pterygoids in the dog are much reduced, and do not reach back to the suspensorium. The frog has no lachrymal bone.