9. aEAMPFs. 29ff 



events as far as the upper jaw is concerned. By comparing tooth 

 with tooth, especially as regards their position in the alveolar margin, 

 the older specimen would appear to have lost the small anterior pair 

 present in the younger one ; whUe in the latter the posterior pair 

 appear not yet to have been developed. It must be confessed that 

 our knowledge of the growth and succession of these organs in the 

 Cetacea is at present so imperfect that we ought not to lay much 

 stress upon any trifling variations in their number or character in 

 discriminating species." — Flower, P. Z. S. 1864. 



" ' Blackfish.' — This fish is in reality a miniature Sperm Whale 

 in its habits, &c., feeding upon the same food (' squid'), geographi- 

 cally occupying the same localities as the Sperm Whale, following 

 the great equatorial currents so long as they retain their warmth, 

 and met with in the greatest numbers in the southern hemisphere at 

 those points where the equatorial meet the polar currents, eddies 

 being formed in which no doubt the squid collects. I am not aware 

 that the Blackflsh preys upon anything but squid ; it is essentially 

 gregarious, countless hordes being met with where food is abundant. 

 Length 12 to 15 feet ; diameter 3 to 4 feet. Weight two to three 

 tons, the former about the average. Oil, the only kind that wiU mix 

 with sperm."— TT. L. Crowther, P. Z. S. 1864. 



Mr. Plower has since received two skulls of the genus Gflolioce- 

 jphalus, probably two distinct species, under the name of " Blackflsh," 

 so that the above description may refer to them. See Plower, 

 P. Z. S. 1865. 



9. GRAMPUS. 



Head rounded, forehead rather convex. Teeth conical, of upper 

 jaw early deciduous, only in the front half of the lower jaw. Dorsal 

 distinct, low, rather behind the middle of the back. Pectorals ovate, 

 rather elongate. 



SkuU depressed; intermaxUlaries dilated, covering great part of 

 the maxilla above, rather swollen behind in front of the blowers, the 

 hinder wing of the maxilla horizontal aud rather thickened and bent 

 up over the orbit, and slightly dilated and reflexed just in front of 

 the notch. 



Grampus (pars), Gray, Spic. Zool. 2, 1828. 



Grampus, Gray, Zool. E. &■ T. 30, 1847:- Cat. Cetac. B. M. 1850, 82; 



P. Z. S. 1864, 245. 

 Cetus, sp. (Aries), Wagler, N. S. Amph. 33. 

 Phocsena, sp., Wagler, N. S. Amph. 34. 



* Triangle in front of the blowers dwigate, produced in front over 

 the .vomer. 



1. Grampus Cuvieri. Cuvier's Grampus. 



Bluish black ; beneath dirty white, passing into the black on the 

 sides. Nose of the skull brdad at the base, narrow in front, and coa- 



