CETACEA. 



121 



b. Skull, smaller. Australia. Presented by A. Cunningham, 

 Esq. 



c. Skull. St. Helena. Presented by A. Pearson, Esq. 



d. Skull. Presented by J. J. Bennett, Esq., F.R.S. 



e. to p. Twelve skulls. 



q. Skeleton. English coast. 



Measurement of different skulls in the British Museum. The 

 particular localities are unknown. 



The most prominent difference between the specimens is in the 

 width of the upper jaw in front of the notch, just over the com- 

 mencement of the teeth-series ; but there does not occur any other 

 character in connexion with it. There is also a slight difference 

 in the form of the palate ; in a, the central ridge is narrow and 

 rounded above behind ; in b, it is broad, flat, sharp-edged, and 

 very deeply concave on the sides, under the edges, but the dif- 

 ferent specimens vary in this particular. In d and g, the hinder part 

 of the palate, near the entrance of the inner nostrils, is sharply 

 keeled ; and in a the two ridges are rounded. 



I am by no means certain that with a larger series of skulls in 

 a perfect condition, and with the animals they belonged to, it 

 might not prove that there are more than one species amongst 

 these skulls. 



In all these skulls the intermaxillaries are seen below, forming 



