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ZOOLOGY. 



Order 6. Sirenia. — General Characters of Sirenians. — 

 This small group is represented by the sea-cow or manatee 

 of Florida. The lower jaw is unlike that of whales, being 



\>: 



much as in the cow or horse, while the teeth are well devel- 

 oped, both incisors and molars, the latter with flattened or 

 ridged crowns, adapted for the trituration of vegetable 



