6o EX VIRIBUS VIVIMUS. 



MAMMALS {conlinued). 



? Sheep and Goat, 12 years. (Grindon.) 



less than the Bull. (Bacon.) 



Pig, 20 years. (Bacon.) 

 iSto^,' 30-40 years. (Flourens.) 

 1 Lion, 20 years. (Flourens.) Haller saw one in a menagerie at 

 40 years of age which died at 50. Grindon gives 9-10 years 

 as the life of the lion in menageries ; longer when wild. 

 ? Leopard, Bear, Tiger, 25 years. (Grindon.) 



* Dog, 10-12 years. (Flourens.) Some to 20, 23, or 24 years. 



One was 34 years with a correspondent of the writer. 



* Cat, 9-10 years. Some to 18 years. (Flourens.) Mr. T. W. 



Danby had a cat which died at the age of 18 years ; it had 

 long been unable to move, except very slowly; it walked 

 across a room for milk and died. (Communicated by T. W. 

 Danby, Esq ) 



Rabbit, 8 years. (Flourens.) 



7 years. (Bacon.) 



Guinea Pig, 6-7 years. (Flourens.) 



Man, Fuegian, 45-50 years. 



Civilized, 70-80 years. (The Book of Psalms.) 

 English, 75.5, average age at death of those dying at 51 and 

 upwards. (Farr.) 



VEGETALS. 



PROTOPHYTA, as with Protozoa. 



Euglena divides so rapidly as in a single night to colour a pool 



green. • 



Diatoms, some species divide in 24 hours at certain seasons. 



(Smith's ' British Diatomaceae.') 

 Prolococcus nivalis reddens a district in a single night, so rapid is 



the shifting of individuality by reproductive self-division. 



' ' Hesiod,' says Pliny, ' attributes to the rook nine times our life, to the 

 stag four times the life of the rook, and three times the life of the stag to 

 the raven.' Tevti is the word used by Hesiod, and cetas by Pliny. Aristotle 

 remarks, in the ' History of Animals,' lib. vi. ch. xxix, ' What is related of 

 the longevity of the stag rests upon no foundation : the duration of gestation 

 and growth of the young stag indicates anything but a long life.' 



