136 J. H. LEES 
ridge thus formed of which Cope speaks in his description of Belodon 
buceros when he says that the palate has a strong ridge on each side so 
as to be grooved (Proc. Am. Phil. Soc., Vol. XXIV, 1887, p. 217). 
Transverse.—This is an irregular bone the posterior part of which 
originally was directed vertically downward, while the anterior part 
is turned over at right angles and lies horizontally between the maxilla 
and palatine. The bone has been somewhat displaced from its 
original position by pressure. Across its widest portion it measures 
one and three-eighths inches, and its thickness in this same region is 
five-eighths inch. Farther forward, where the bone is turned over, 
its breadth is seven-eighths inch and diminishes anteriorly, while 
its thickness is seven thirty-seconds to nine thirty-seconds of an inch. 
The anterior part has been broken away, but the full length must have 
been three and three-eighths inches. Its anterior part united along 
the outer edge with the maxilla, along the inner with the palatine. 
The posterior vertical portion united along its whole outer face for 
the rear one and one-fourth inches with an extension of the pterygoid. 
The transverse probably touched the above-mentioned buttress of 
the maxilla. 
Apparently the separate existence of this bone was not recognized 
by von Meyer in describing his specimens of Belodon. Im discussing 
B. kapffi (Paleontographica, Vol. X, p. 234) he says that the anterior — 
end of the pterygoid becomes pointed and extends as far forward 
as the third alveola of the maxilla with which bone it unites out- 
wardly, while inwardly the union is with a bone which may be the 
palatine, and with which it bounds a sharp oval opening 26™™ long 
and 63™™ broad (the palatine vacuity). He also states that this 
bone, together with the jugal, which it touches, forms the anterior 
angle of the temporal fossa. These statements apply exactly to the 
transverse, hence it is certain that von Meyer did not observe the 
suture between the transverse and the pterygoid. Of what he con- 
sidered the large area of the palate to consist is not clear, but prob- 
ably he thought that the palatines extended to the median line. ‘This 
has been shown not to be the case, however, since they are widely 
separated by the pterygoids and vomers. Cope does not mention 
the transverse in his description of Belodon buceros (Proc. Am. Phil. 
Soc., Vol. XXIV, 1887, p. 217), although he recognizes the presence 
