OREODONTA. 
115 
Extreme width between the zygapophyses behind... 0. 015 
Length of the centrum of the anterior lumbar.. 0. 011 
Width of the anterior articular face of the same. . 0.009 
Depth of the same... 0. OOG 
Elevation to the base of the neural spine. 0, 011 
Extreme width between the posterior zygapophyses. 0.0075 
Total width of the sacrum anteriorly... 0.0250 
Width of the same between the interneural foramina.. 0.0084 
Total depth in front. 0.0120 
Depth of the centrum in front. 0.0072 
Length of a caudal vertebra. 0. 013 
Diameter of the centrum behind. 0.007 
Greatest diameter of the head of the humerus. 0.012 
Diameter of the shaft below the head. 0.008 
Transverse diameter of the shaft of the femur at the little trochanter. 0.0120 
Transverse diameter of the same just below the little trochanter. 0.0085 
Antero-posterior diameter of the distal end of the femur. 0. 014 
Width of the patellar groove.. 0.0055 
Diameter of the shaft of the tibia at the middle... 0.0055 
Diameter of the distal end (transverse). 0.0095 
Diameter of the same (antero-posterior). 0.0066 
The size of this Carnivore was less than that of the domestic cat, and 
perhaps nearly that of the skunk. 
Stypolophus secundarius, Cope. 
Prototomns secundarius, Cope, System. Cat. Eocene New Mexico, D. S. Geog. Survs. 
W. of 100th M., 1875, p. 9. 
Represented by an incomplete mandibular ramus, which supports four 
molars. The penultimate has a well-developed heel, whose outer border is 
elevated and acute, and turned in, so as to approach the middle of the 
crown. The fourth molar from behind has a heel with a symmetrically 
median cutting-blade. Enamel smooth. The ramus indicates a species the 
size of an Opossum, and intermediate between the P. viverrinus and the 
P. multicuspis. 
Length of the crowns of two anterior true molars. 0.0150 
Length of the penultimate molar... 0. 0075 
Width of the same... 0. 0033 
Depth of the ramus mandibuli at the penultimate molar. 0.0125 
Thickness of the same at the penultimate molar. 0. 0050 
Length of the crown of the third premolar. 0. 0080 
