iMr, 



CAUSES OF E.xrrNCTroN 



riiAi'. \'in 



lixiiiL;" ini)iil<c_\ s ? and _\rl in this ci)ni|)arali\ c iarit\-, \\ c sliould 

 ha\'C tlic plainest exiile-ncc of less faxourablc conilitions Uir 

 their cxistente. Tn admit that spt-eies i^enerall)- become rare 

 beloie tlie)' Ijceome extinct- to led no siir[)rise at llie com- 

 paratix'c rarit)' of one species witli another, and }'ct to call in 

 some cxtraordinar)' ai:;cnt ami to marxcl i^reatl)- when a species 

 ceases to exist, appears to me much the same as to admit that 

 sickness in the indivithial is the prelude to death to feel no 

 siu^prise at sickness — but when the sick man dies, to wonder, 

 and to belie\e that he ditxl thron"h \ iolenee. 



m&m 



I.AIMFS LOMIIS, liANIM (HMl.N TAI.. 



