404 THE HUMAN SPECIES 



peculiar to man, namely, the fungus of Pityriasis (tinea) versi- 

 color, Microsporon furfur, the fungus of thrush, Oi'dium (or Sac- 

 charomyces) albicans, and the fungus which is parasitic in 

 gastric mucus, Sarcina ventriculi (Figs. 205, 206, 207). 



The remainder occur also in animals, such as Microsporon 

 Audouini (ringworm), Achorion Schonleini (favus), and the 

 fungus of Tinea circinata, which is common to man, dogs and 

 cats ; and Trichophyton tonsurans, which produces the char- 

 acteristic ringworm among men, cattle, dogs, horses, goats and 

 cats. 



Intoxications. 



Seeing that there is a general physiological similarity 

 between man and the remaining red-blooded animals, and 



FIG. 205. Micro- 

 sporon furfur. 



FIG. 206. Oi'dium albicans. 



especially with those which are warm blooded, it may very 

 naturally be assumed that the poisons which are dangerous to 

 man will also damage all Vertebrates, and to a greater degree the 

 higher they stand in the zoological scale. Gradually acquired 

 or inherited immunity may cause exceptions to this general 

 rule. Reports on the action of various poisons are nearly all 

 with reference to domestic animals, as for obvious reasons 

 observations on wild animals are very few and far between. 

 As regards the former class, Friedberger and Frohner l have 

 demonstrated their complete correspondence with man in the 

 sphere of toxicology. 



Among corrosive poisons, which act upon the skin and still 



1 Friedberger und Frohner, op. cit., Bd. i., p. 240. 



