Dr. H. Burmeister on Ms so-called Globiocephalus Grayi. 53 



4. The nasal bones are of very different form, without the 

 high knob behind, but each with a deep diagonal furrow, 

 which divides them into two faces. 



5. The tip of the united parietal bones, with a prolon- 

 gation going in between the frontals, is not pointed as in Ps. 

 erassidenSj but broad and ti'uncate as in Ps. meridionalis. 



6. Both the upper and the under jaw have the same num- 

 ber of 7iine teeth, of which the first in the upper jaw is much 

 smaller than the others, but the last of equal size with the 

 preceding ones. This character does not agree with the other 

 species ; both have one tooth more in the under jaw than in 

 the upper jaw. Ps. crassideris has eight teeth above and nine 

 below, and Ps. meridionalis nine above and ten below, the 

 first of the upper jaw of this species being also much smaller 

 than the following ones. 



This diiference seems to me to be of great importance, and 

 alone sufficient to prove the distinctness of my species. 



7. The vomer is visible between the upper maxillary bones 

 in my skull, but not visible in Ps. meridionalis. 



8. At least the form of the teeth is entirely different from 

 that in both the previously known species ; neither of them 

 has the teeth so thick, short, and worn as my species from the 

 Patagonian coast. 



For all these reasons I believe I am quite justified in sepa- 

 rating this animal as a distinct and new species from Ps. cras- 

 sidens and Ps. meridionalis, naming it now 



Pseudorca Grayi. 



As I have given a comparative description of the skull in 

 the ' Anales,' and also added the measurements (p. 373) on 

 the metrical scale, I will not here repeat the same, but add 

 only the principal measurements of the skulls of the three 

 species in English inches, in the same manner as they are 

 given by Gray in his ' Catalogue of Seals and Whales,' pp. 290 

 &294. 



