OSTEOLOGY OF ANTARCTIC SEALS. 31 



have also examined the crania of the seals in the University Museum of Science and 

 Arts, Edinburgh, and include such in the following list : 



2. 1. 5 



Weddell seal : 2 1 specimens with formula . 



1 specimen 



2. 1. 5 

 2. 1. 6 



2. 1.5 



The fourth post-canine in the upper jaw was obviously split into two, thus account- 

 ing for the variation. 



2. 1. 5 



Sea-leopard : 5 specimens with dental formula 

 Crab-eating seal : 7 specimens with formula 

 Sea-lion (Otaria Jubata) : 2 specimens with formula 



1 specimen 



2. 1. 5 



2. 1. 5 



2. 1. 5 



3. 1. 5 

 3. 1.5 



3. 1. 6 

 3. 1. 5 



LITERATURE. 



The Zoology of fhe Voyage of the " Erebus " and " Terror," pp. 7-8, plates vii. and viii. 



J. E. GRAY, Ommatophoca Rossi, 1844. 



Challenger Reports, vol. xxvi., Sir WM. TURNER, 1888. 



RtmUats du Voyage du S.7. " Belgica," G. E. H. BARRETT HAMILTON, 1901. 



National Antarctic Expedition : Natural History, vol. ii., E. A. WILSON. 



DESCRIPTION OF PLATE. 



FIG. 1. Ross skull, No. 43. Superior aspect. 

 FIG. 2. Ross skull, No. 43. Lateral aspect. 

 FIG. 3. Ross skull, No. 43. Anterior aspect. 



non-articular area on head. 

 FIG. 4. Ross skull, No. 43. Inferior aspect. 



FIG. 5. Ross seal, No. 43. 15th dorsal vertebra. 

 Showing costal process on right side, and 

 facet for rib on left side. 



FIG. 6. Ross seal, No. 43. Femur showing 



(ROY. soc. KDIN. TRANS., VOL. XLVTL, 201.) 



