282 FAUNA AMERICANA. 



Stomach consisting of five, sometimes seven 

 distinct pouches ; spleen divided into several dis- 

 tinct lobes. 



First Division. 



Small headed whales. 



Characters. Head of usual proportion with 



the body. 



Genus. 



Delphinus^ Linn. Briss. Erxleb. Gmel. Cuvier. 

 Geoff. UHg. 



Delphitiapterus, Lacep. 

 Mojiodon, Fabicius. 

 Hyperoodon, Lacep. 

 ,^narnacus, Lacep. 

 Ura?iodon, Illig. 

 Jlncylodon, Illig. 

 BaliBna, Chemnitz. Dolphin. 



Characters. Teeth all of one description, in 

 form of canines; sometimes a little compressed, 

 and serrated on their cutting borders; in numbers 

 exceedingly various, from a total absence of teetli 

 to as many as two hundred or not more than two. 



Jaws more or less produced, in form of a beak, 

 not provided with tusks ; the blowing hole in 

 form of a cross, on the top of the head. 



Sometimes an adipose dorsal fin ; sometimes 

 a simple longitudinal cuticular fold on the back; 

 tail flattened horizontally, and bifurcated. 



No caecum. 



