CONDYLAETHEA. 445 



border of the capitular facet, and the lateral edge of the centrum is unin- 

 terrupted from this facet to the posterior one. 



The anterior Imnhar vertehrce are not depressed, this feature only 

 appearing in the centrum of the sixth and last. All the centra are keeled 

 below, and all except the last very prominently keeled. The diapophysis 

 is well developed on the first lumbar, and its base is rather robust and its 

 middle is anterior to the middle of the centrum. In the succeeding verte- 

 brae its base is more depressed and more extended posteriorly The dia- 

 pophysis is directed anteriorly excepting on the last centrum, where it is 

 transverse. The neural spines are directed forwards, and the base of that of 

 the sixth lumbar is shorter and less compressed than that of the others. On 

 the first lumbar there is a narrow metapophysis on the external side of the 

 prezygapophysis. On the second, third, and fifth it is less elevated, and is 

 continued as a lateral crest, half way to the postzygapophysis. It is broken 

 from the fourth. On the sixth it is less elevated, and does not extend beyond 

 the line of the middle of the base of the neural spine. On the first lumbar 

 the articular faces of the postzygapophyses are nearly flat and rise outwards 

 at an angle of 45°. On the second they are more convex and are a little 

 produced upwards. They are separated from each other by a deep notch, 

 wliicli is continued as a groove along the basal posterior part of the neural 

 spine. As compared with those of Tapinis terrestris the lumbar vertebrae 

 are more elongate and much more strongly keeled. Their proportions are 

 more like those of HyracotJierium venticolum, but they are less depressed 

 and more strongly keeled. The postzygapophyses are totally different from 

 those of the Tapirus and are more like those of Hyracotherium, but are, so 

 far as preserved, less revolute. 



The sacrum is I'ather narrow, and each of the posterior three centra of 

 the four of which it is composed is concave in all its inferior longitu- 

 dinal lines. The first is obtusely prominent on the middle line below, and 

 gently <;oncave between the latter and the descending distal edges of the 

 diapophysis. The centra are coossified, but the lines of junction are promi- 

 nent. They are slightly flattened at the middle line, producing ;in angular 

 section, or even a slightly double concave one, at the junction of the third 

 and fourth, where there are three longitudinal ridges. The continuous dia- 



