FAUNA AMERICANA. 275 



lishes ; viviparous ; suckling their young as other 

 mammifera, &c. 



Inhabit nearly all seas, at least the whales pro- 

 perly so called, but they appear to prefer the 

 polar regions to temperate or warm latitudes. 

 The Herbivorous cetacia on the contrary, are pe- 

 culiar to the equatorial regions. 



1. Family^ CETACEA Herbivora, Sirenia. 



Character. Crowns of the molar teeth flat; 

 furnished with tusks sometimes in the upper jaw. 



Two pectoral mammae ; whiskers in some in- 

 stances large. 



Nostrils placed at the end of the snout ; nasal 

 apertures in the skull situated superiorly. 



Body very massive. 



Genus. 



Manatus, Rondelet, Linn. Scopoli. Storr, La- 

 cep. Cuv. Geoff. Illig. 



Trichechus, Linn. Erxleb. Schreb. Shaw, Grael. 

 Manati^ Bodd. Lamantin^ Cuv. 

 Sea Coiv. 



CHARACTERS. 



€ Incisor 2. 

 r superior 18 or 20, < Canine 2. 



Dental formula.— teeth 34 or 38.< C Molai- 14 or 16. 



r Incisor 0. 

 inferior 16 or 18, < Canine 0. 



C.Molarl6orl8, 



