PLATE XII 



Skulls of Southern Sea Lions, females. Ventral aspects. 



Fig. I. First year, No. 1102. 



Fig. 2. Second year. No. 1075. 



Fig. 3. Third year, No. 1078. 



Fig. 4. Fourth year. No. 1023. 



Fig. 5. Fifth year, No. iioo. 



Fig. 6. Sixth year or over, No. 1132. 



