3o6 



DESIGN IN NATURE 



themselves upon food, and of seizing, digesting, absorbing, and assimilating it, are in no sense the result of 

 irritation, of stimulation, or of accident. All that can be said is, that they are living entities, and move to given 

 ends ; these ends being (within limits) pre -determined. Similar remarks may be made of all plants and animals. 

 They are, to a large extent, superior to their surroundings and environment ; they are (when normal) in no instance 

 jogged into activity by what are known as irritability and stimuh ; neither do they owe their existence to a fortuitous 

 aggregation of accidental parts and particles (spontaneous generation), as apart from law, order, design, and pre- 



existent parents. 



Examples of low parasitic forms as they occur in various diseases are given at Figs. 61 and 62, and specimens 

 of rudimentary plants and animals are dehneated at Plates Ixxix., Ixxx., Ixxxi., and Ixxxii. 



Fir,. 61. 



Fig. 61.— Illustrates the parasites seen within the red blood-corpuscles in malarial fever. Magnified 1000 diameters (after 

 Manson). 



A. Early intra-corpuscles form of " mild tertian " parasite. 



B. Two members of the " rosette " series of the same parasite ; that to the right shows the radiate segmentation, that to the 

 left is an earlier stage. In both the pigment is collected in the centre. 



C. Two " ring-forms " of the quotidian parasite, within the red blood-corpuscles. 



D. Shows a " crescentic body," from a case of malignant tertian fever. 



E. A flagellated organism, derived outside the body from a crescentic form. 





Fig. 62. 



Fig. 62.— Illustrates various forms — dotted, rod-shaped, branching, spiral, &c,— of bacteria as seen in diseased conditions. 

 Magnified 1000 diameters (after Muir and Ritchie). 

 A. Streptococci of acute suppuration. 



