114 
CREODONTA. 
long. A caudal vertebra is of moderate length, indicating a well-developed 
tail. It has large diapophyses, and a narrow median plane below, a little 
wider at the ends of the centrum. 
The head of the humerus has about equal transverse diameters; the 
condyle is slightly produced posteriorly, and then strongly recurved. The 
greater tuberosity is not produced in any direction, and is flat on the outer 
side; the lesser tuberosity is rather protuberant, bounding a wide, shallow 
bicipital groove, which is not defined on the shaft. The great trochanter 
of the femur is slightly expanded transversely, and is connected with the 
head by the usual broad plate, inclosing with it a strong fossa. At the base 
of the little trochanter, the section of the shaft is oval, with the external 
end narrowed and the internal widened, as in that of the egg. The distal 
end of the femur is somewhat compressed, with a moderately elevated patellar 
groove, with slightly unequal bounding ridges. The condyles diverge 
slightly, and are marked on the outer side with pit-like muscular insertions. 
The middle of the shaft of the tibia is cylindric. The distal end presents 
the peculiar character already observed, and noted under the head of the 
genus. The posterior face of the bone is flat for the distal fourth, and is 
separated from the outer face by a longitudinal solid right angle. The 
anterior face is convex, and the horizontal border of the distal or astragaline 
surface forms a right angle with the produced malleolus of the inner side 
of the bone. The posterior margin of the astragaline surface is very 
different, being a straight diagonal, which crosses the plane of the anterior 
border at the cmgle just mentioned. The inner face of the distal part of 
the shaft is flattened-convex, and expands to the distal end of the malleolus. 
The inferior margin of the latter is oblique, the anterior margin being pro¬ 
duced. A large shallow groove marks it& posterior part, which is divided 
by a faint longitudinal ridge, indicating the positions of the tibialis 
posticus and flexor longus digitormn tendons. It is bounded by low ridges, 
the posterior bounding the plane posterior face of the shaft. 
Measurements. 
M. 
Length of the centrum of a cervical vertebra.. 0. 010 
Width of the same anteriorly. 0.007 
Width of the same posteriorly. . 0. 007 
Depth of the same posteriorly... 0. OOG 
