Gatty Marine Laboratory, St. Andrews. 155 



Large <$ Killer, and Iteinhardt's Pseudorca crassidens. 



Reinhardt's 

 6. 21 ft. 



inches. ft. ins. 



Length of head from occipital condyle to tip of 



snout 38| 3 6 



Length of head from inferior margin of occipital 



process to fissure between condyles 36 



Length of cranial portion from occipital con- 

 dyles to front wall of nasal canals 11 



(This is an uncertain measurement, as no 

 definition in front and no mention of pro- 

 minence on base of occipital condyles.) 

 Length of beak from origin on level with 



anterior extremity of zygomatic 19 



Greatest breadth of skull (across zygomatic 



process of temporal bone) 23^ aht. 



(broken) 

 Breadth of skull across postorbital process in 



front 22| abt. 



Breadth of occipital ridge at union with tem- 

 poral ridge 14^ abt. 



Breadth across prominences formed by the 

 frontal, the superior maxillary, and the 



zygomatic in front of orbit 21 abt. (left 



prominence broken) 



Breadth of beak at origin 13£ 



„ „ towards middle, third lateral 



tooth 12 



Height of occipital foramen (at its narrowest 



part) 2h 



Breadth of occipital foramen 2^ 



Distance from inferior margin of occipital 

 foramen to posterior margin of pterygoid 



bones 13 



Length of dental row in upper jaw 16| 1 2| 



,, mandible from condyle to tip 31f 2 8j 



,, symphysis 6£ 



„ deutal row in inaudible 15 1 



Height of skull from base of occipital to 



parietal crest 15j abt. 



In viewing it from above and in front it is obviously more 

 symmetrical tliau that of Globiocephalus, the nostrils having 

 only a slight slope to the left, whereas in Globiocephalus the 

 slope is pronounced. Moreover, the nostrils are nearly vertical, 

 whilst those of Globiocephalus slope boldly upward and back- 

 ward. The nasals were elongated transversely and in this case 

 narrow, the right larger than the left, and an internasal 

 process of the frontal separated them. In Globiocephalus 

 this process does not always reach the front, and there is 

 variety also in Urea. The premaxillaries of Orca are scoop- 

 shaped superiorly, and their long narrow outline, with a 



11* 



