224 



Reviews — Prof. 0. C. Marsh's Dinocerata. 



alone excepted. The fore-limbs have a general resemblance to those 

 of Proboscidians. The fore-foot is larger than the hind one in all 

 the Dinocerata. The bones comprising it are comparatively short 

 and massive. There were five well-developed digits, as in Probo- 

 scidians, but the carpal bones were interlocked with the metacarpals 

 as in the Perissodactyles. The general appearance of the fore-foot 

 in Dinoceras mirahile is well shown in Fig. 16. The hind-foot is 

 represented in Fig. 17. The feet were plantigrade as in the Elephant. 



" There are eight separate carpal bones in the fore-foot of all the 

 Dinocerata, and a ninth, the central bone, may be separate in very 

 young animals, and, in adults, either lost or consolidated with the 



scaphoid, or the trapezoid The metacarpal bones are short 



and robust The phalanges in the fore-foot are very short, and 



comparatively small. Sternal bones are preserved in a number of 

 individuals of the Dinocerata. in the Yale Museum, but the entire 



series in any one individual has not been recovered The most 



marked character of these bones is that they are flat and horizontal, 

 as in the Artiodactyles, and not vertical, as in the Proboscidians, 

 and the Perissodactyles." 



The pelvis has a general resemblance to that of the Elephant. 

 The ilia were widely expanded, as in that animal. There are four 

 sacral vertebrse. 



Fig. 16. — Left fore-foot of Dinoceras 

 mirabile. Marsh. 



Fig. 17.— Left hind-foot of the 

 same. Both figures are one-fifth 

 natural size. 



The Bind Limbs. — " The hind limbs of the Dinocerata have a 

 general resemblance to those of Proboscidians, but the bones com- 

 posing them are comparatively shorter, and more robust. "When the 

 animal was standing at rest, the posterior limb formed a strong and 

 nearly vertical column. 



" The hind feet were considerably smaller than those in front. 

 .... There were five digits, as in the Proboscidians, and the axis 

 of the foot was through the third, or middle, digit. 



" There are seven well-developed tarsal bones in the Dinocerata, 



and their relative position in the hind foot is seen in Fig. 17 



An eighth tarsal bone, the tibiale, appears to have been present. 



