596 ZOOLOGY. 
Steller’s manatee (Rhytina Steller’) was in the last century 
found in abundance on the shores of Behring’s Island on the 
coast of Kamtchatka; twenty-seven years afterwards (in 
1768) it was totally exterminated by the sailors ; a few im- 
perfect skeletons exist in the National museum. This is the 
Fig. 518.—The Dugong.—From Brehm’s Thierleben. 
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largest Sirenian ha it was over six metres in length. 
It differed remarkably from the other forms, in having no 
teeth, but was provided with a very large, horny, palatine 
plate, and a corresponding one covering the enlarged point 
of union, or symphysis, of the lower jaws. In the Tertiary 
