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racterized by, and derives its name from, the peculiar emi- 

 nences existing on the teeth. Twelve species have been 

 ascertained : one of which, the largest, is of gigantic di- 

 mensions. They are all found in what is considered as a 

 fresh-water formation ; similar to that which contains the 

 remains of the palseotherium and anoplotherium. These 

 remains have hitherto been met with only in France and 

 Germany. 



Elasmotherium. — Only one species of this fossil genus 

 has been found, and that in Siberia. It appears from the few 

 fragments which have been deposited in the Museum at 

 Moscow, and which have been described by Fischer, to have 

 approximated in its size, and many of its characters, to the 

 rhinoceros, and is supposed to have belonged to a tribe inter- 

 mediate between that animal and the horse. 



Tardigradi. — The megatherium of Paraguay, and the 

 megalonyx of Virginia, are among the lost animals of a former 

 world, for a just knowledge of the nature of which we are 

 indebted to our illustrious teacher, Cuvier, who has ascer- 

 tained that they are two species of the same genus belong- 

 ing to the family of edentata, and may be placed between the 

 sloths and the ant-eaters, but nearer to the former than to 

 the latter. The wonderful anatomy of the sloths, displaying 

 such deviations from that beautiful adaptation of parts to the 

 offices which they are to perform, and producing the per- 

 sonification, as it were, of wretchedness, manifests such pe- 

 culiarities of structure as can hardly fail to be recognised in 

 any tolerably preserved remains. The arm and fore arm 

 together are nearly twice as long as the leg and thigh, so 

 that, when the animal would walk on all four, it is 

 obliged to trail along on its elbows ; the pelvis is so wide, 

 and the cotyloid cavities turned so backwards, that it is 

 obliged to keep the thighs wide asunder. The construction 



