52 PICTURE OF ORGANIZED NATURE. 



seas of all parts of the world. They swim with such 

 rapidity, that Lacepede compares their velocity to 

 that of sound. 



2. The Genus of the Spermaceti Whale (Physeter) 

 chiefly inhabits the seas of the Southern Hemisphere, 

 between the icebergs ; but it is also found in the 

 seas of all climates. 



3. The Unicorn Fish (Monodo?i) inhabits the same 

 seas as the Whale, but is rarely to be met with in 

 the middle of the Temperate Zone. 



4. The Dolphin (Delphinus) is found in all seas, 

 but particularly in the Polar Seas. 



5. The Walrus (Trichecus) inhabits, in the greatest 

 number, the seas of Spitzbergen, Greenland, Nova 

 Zembla, Kamtchatka, &c., and similar regions in the 

 Southern Hemisphere. It has sometimes happened 

 that, in the vicinity of the 75th degree N.L., more than 

 eight hundred Walrusses have been killed in seven 

 hours. Species of this Genus, but not in great num- 

 bers, are met with in the Temperate and Warm Zones. 



6. The Seal (Phoca) does not seem to extend so 

 far between the icebergs of the Polar Seas as the 

 Whale : some species of it, however, are found in 

 both Hemispheres, in great numbers, in the Polar 

 Seas, and also in the Temperate and Warm Zones. 

 About Greenland, according to Crantz, there are five 



