212 JR. 8. Lull— Fossil Dolphin from Galifor 



lint. 



of Delphimis, with the following exceptions. The exoecipital 

 bones in the fossil have a much less lateral extent in proportion 

 to their height. The squamosal bone is very robust and broadly 

 expanded antero-posteriorly so as to be both actually and rela- 

 tively larger and heavier. The orbit is large and well rounded 

 and the superior limiting bones, frontal and jugal. are compar- 



Fig. 1. 



Fig. 1. Skull seen from the right, about y 2 uat. size. 



atively heavy. The frontal plate of the maxilla does not appear 

 to have the full lateral or posterior expanse which is character- 

 istic of the modern type, as its presence cannot be detected in 

 the antorbital or orbital regions viewed laterally. What appear 

 to be fragments of the zygomatic process of the jugal are at 

 least twice the diameter of that of DeVphinus. In the sharp- 

 edged posterior limitation of the temporal fossa, the fossil 

 agrees with Delphi?ius in contrast to Phoccena. 



Jaw. — The two forms may be contrasted in the proportions 

 of this bone, for whereas the entire length of the mandible is 

 2T8 mm in the fossil to 3T0 mra in the recent form, their vertical 

 expanse at the posterior end is essentially the same. This 



