Wortman — Studies of Eocene Mammalia, etc. 421 



Art. XLV. — Studies of Eocene Mammalia in the Marsh 

 Collection, Peabody Museum ; by J. L. Wortman. With 

 Plates VIII and IX. 



[Continued from p. 3 82. J 



The Manus. (Figures 48, 49.) — As compared with the pes, 

 the bones of the manus, especially the metacarpals and phalanges, 

 appear shorter, heavier, and more robust. The carpus con- 

 tains the eight bones common to the Creodonts. The scaphoid 

 is rather flattened from above downwards ; its proximal sur- 

 face is occupied by an anterior convex facet for contact with 

 the radius, posterior to which there is a roughened area for 

 ligamentous attachment, and a large posteriorly projecting 

 process at the inner posterior angle. Externally there is a 



•Figure 49.— Same foot as in Figure 48, before removal of matrix; side view; 

 one-half natural size. 



facet by which it touches the lunar, and inferiorly there are 

 three facets, — an inner lunate, a median rhomboidal, and an 

 outer elongated oval, for articulation with the trapezium, trape- 

 zoid, and centrale, respectively. 



The lunar is distinct, and of a more or less quadrate form 

 when viewed from in front ; superiorly it presents a convex 

 facet for articulation with the radius ; internally a flattened 



