186 ESSAY ON CLASSIFICATION. 



sustenance, as the herbivorous animals afford the needful 

 food for the carnivorous tribes. We are too far in advance 

 of the time when it was supposed that Worms originated in 

 the decay of fruits and other vegetable substances, to need 

 here a repetition of what is known respecting the repro- 

 duction of these animals. Nor can it be necessary to 

 show how preposterous the assumption would be that 

 physical agents produced plants first, in order that from 

 these animals might spring forth. Who could have taught 

 the physical agents to make the whole animal world de- 

 pendent upon the vegetable kingdom ? 



On the contrary, such general facts as those above 

 alluded to, show, more directly than any amount of spe- 

 cial disconnected facts could do, the establishment of a 

 well-regulated order of things, considered in advance ; for 

 they exhibit well-balanced conditions of existence, pre- 

 pared long beforehand, such as only an intelligent being 

 could ordain. 



SECTION XXX. 



PARASITIC ANIMALS AND PLANTS. 



However independent of each other some animals may 

 appear, there are yet many which live only in the closest 

 connection with their fellow-creatures, and which are 

 known only as parasites upon or within them. Such are 

 the intestinal Worms, and all the vermin of the skin. 1 

 Among plants, the Mistletoe, Orobanche, Eafflesia, and 



1 See above, p. 114, p. 115, note 1, (C. M.), Historia Vermium, etc., q. a., 



and p. 116, notes 1 and 2; see also p. 45. KUCHENMEISTER (Fit.), Die 



RUDOLPHI (K. A.), Entozoorum sive in und an dem Korper des lebenden 



Vermium, etc., q.a., p. 45. BREMSER Menschen vorkoramenden Parasiten; 



(J. G ), Ueber lebende Wiirmftr im Leipzig, 1855, 8vo., Engl.byLANKAS- 



lebenden Menschen; Wien, 1819, 4to. TER (Cavendish Society). LECCKART 



DDJARDIN (F.), Hist. Nat. des Hel- (R.)> Parasiten in Parasitismus. Vie- 



minthes, etc., y. a., p. 45. DIESING rord's Archiv., 1852. ROBIN (Cn.), 



