differences in coloration and the differences in numbers of 

 teeth. 



Atlantic White-Sided 

 White- Beaked Dolphin Dolphin 



TEETH 



22-28 per side per jaw. 



30-40 per side per jaw, 

 sometimes more in upper 

 jaw. 



COLORATION 



Beak sometimes gray or 

 white above and below; two 

 pale areas visible on living 

 animals not visible on strand- 

 ed specimens. 



Beak all black: side marked 

 with elongated areas of 

 white with streaking pat- 

 terns of yellow and tan. 



Additional characteristics by which the two species may 

 be distinguished are summarized on p. 123. 



X 



Figure 141.— White-beaked dolphins reach nearly 10 feet (3.1 m) in length. Stranded animals, such as this specimen from Scotland, should be 

 distinguishable from Atlantic white-sided dolphins by their differences in coloration. This species sometimes has a white beak and always lacks the 

 elongated white patch and tan or yellow streaking found on the side of Atlantic white-sided dolphins. (Photos by A. S. Clarke.) 



127 



