THE 



AMERICAN JOURNAL OF SCIENCE 



[FO URTH SERI ES.] 



Art. IX. — New Tertiary Artio dactyls; by Richard 

 Swann Lull. With Plate I. 



[Contributions from the Othniel Charles Marsh Publication Fund, Peabody 

 Museum, Yale University, New Haven, Conn.] 



Table of Contents. 

 Introductory. 



Associated material. 

 Aletomeryx gracilis, n. gen. n. sp. 

 Description of mount. 

 Morphology. 



Axial skeleton. 

 Skull. 

 Horns. 



Facial and cranial bones. 

 Brain. 

 Mandible. 

 Teeth. 

 Hyoid. 

 Vertebral column. 

 Cervical vertebrae. 

 Dorsal vertebras. 

 Lumbar vertebrae. 

 Sacrum. 



Caudal vertebrae. 

 Eibs. 

 Sternum. 

 Appendicular skeleton. 

 Fore limbs. 

 Scapula. 

 Humerus. 

 Eadius. 

 Ulna. 

 Carpals. 

 Metacarpals. 

 Phalanges. 

 Lateral digits. 

 Hind limbs. 

 Pelvis. 

 Femur. 

 Patella. 



Tibia and fibula. 

 Tarsus. 

 Metatarsus. 

 Phalanges. 

 Blastomeryx marshi, n. sp. 

 Summary. 



Am. Jour. Sex— Fourth Series, Vol. L, No. 296.— August, 1920. 



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