202 PROCEEDINGS OF THE ACADEMY OP [1885. 



EXPLANATION OF FIGURES AND PLATE. 



Fig. 1. Side view of skull of Cervus canadensis. 

 Fig. 2. Side view of Oervalces americanus. 

 Fig. 3. Side view of Alces machlis. 



References for figs. 1-3. — Fr., frontal; N., nasal; Tb., turbinal; 

 Pmx., premaxilla ; M., maxilla ; Pf., prefrontal (?); 0., orbit; 

 A. 0., ante-orbital vacuity. 

 Fig. 4. Skull and antlers of Megaceros hibernicus. 

 Fig. 4 a. Right antler of Megaceros hibernicus, from the inside (from Owen, 



British Foss. .Mam. and Birds, fig. 186, p. 4">6). 

 Fig. 5. Skull and antlers of Oervalces americanus. 

 Fig. C. Skull and antlers of Alces machlis. 



References for figs. 4-6. — Br., brow antlers ; Bz., bcz-tine; P.T., 



posterior tine (as of Brooke's system); A., anterior division of 



main antler; P., posterior division of main antler. 



Fig. 7. Right tarsus of Oervalces americanus. T., tibia ; Ca., calcaneum ; 



As., astragalus; iV, Cb. & 2 & 3, compound bone formed by 



fusion of cuboid, navicular, second and third cuneiforms ; CI, 



first cuneiform, fused with metatarsus ; Mt., metatarsus. 



Plate II. 



Skeleton of Oervalces americanus (from a photograph). The scale is in 

 feet, and tenths of feet. 



I wish to express here my obligations to Dr. F. C. Hill, Curator of the 

 Museum, for his invaluable assistance in this work. I am indebted to him 

 for the drawings of Figs. 1, '2, :! and 7. 



