COKYPHODON. 
239 
distal end of tlie fibula is also unusually massive, presenting inward tlie 
usual extensive oblique area as broad as long, and divided into three facets, 
two proximal, one of which is the larger, and a distal for the calcaneum, 
which is the smallest. The astragalus is broader than long, and the superior 
face is slightly concave. The anterior and posterior inferior faces have planes 
nearly at right angles. The former is divided into the cuboid and navicular 
facets by a tuberous projection. The calcaneum is short and flat, wdth a 
slender posterior free portion of subround section. Its proximal portion 
below the articular faces is deeply excavated by ligamentous pits. The 
cuboid bone is wider than thick antero-posteriorly, and thicker than long. 
Its outer portion thins away to a longitudinal edge. The calcaneal facet is 
larger than the astragalar, and is transverse, while the latter is antero¬ 
posterior. These faces make a strong angle with each other, the astragalar 
being parallel with the metatarsal face of the bone. The latter is wider than 
deep, and forms one slightly concave plane, in which the two metatarsal 
facets are distinguishable. The inner of these is very large; the outer 
incloses about half its area. A portion only of the navicular is preserved. 
It is a thin bone with a sharp lateral margin, and the metatarsal facets well 
defined. The superior face is slightly concave. 
Measurements. 
]sr. 
Vertical diameter of the axial facet of the atlas. 0. 039 
Length of the neural arch of the atlas.. 0. 040 
Length of the superior base of the transverse process of the atlas. 0. 037 
Vertical diameter of the vertebral canal of the atlas. 0. 010 
Vertical diameter of the centrum of a cervical vertebra . 0. 040 
Trans7erse diameter of the centrum of the same.. 0. 065 
Length of the glenoid cavity of the scapula. . .. 0. 075 
Width of the glenoid cavity of the scapula.. .. 0. 062 
Distance from the glenoid cavity to the base of the spine. 0. 026 
Width of the scapula at the superior end of the spine... 0.115 
Length of the scaiuda from the superior end of the spine to the apex__ 0. 053 
Width of the distal trochlear surface of the humerus. 0. 066 
Transverse diameter of the internal tuberosity of the humerus.. 0. 033 
Short diameter of the head of the humerus. . 0. 075 
Long diameter of the shaft of the humerus at the inferior extremity of the crest. 0. 064 
Short diameter of the shaft of the humerus at the same point. 0. 040 
Diameter of the ulna beyond the middle of the shaft | yeTtfcaT^^ 
