540 GENERAL ANATOMY. 



that he once saw in the kidneys of man, worms similar to 

 those of the kidneys of the dog. 



The spiroptera hominis is a species yet doubtful, observed 

 by Messrs. Barnett and Lawrence, and discharged from the 

 urinary bladder of a woman. 



H. Cloquet has recently described under the name of Ophi- 

 ostoma ponterii, a worm thrown up by a man in vomiting, 

 and observed by Pontier. 



Many other worms have been indicated as inhabiting the 

 human body, which are only found in animals; others are 

 only larvae, or other objects more or less analogous to the 

 worms which are found accidentally in excretions, or which 

 have been placed there by deception. 



ARTICLE II. 

 OF PARASITIC ANIMALS. 



860. Parasitic animals are much more foreign to the or- 

 ganization than the entozoaric. 



Some of them however are insects born, living, and repro- 

 ducing themselves on the surface and within the substance of 

 the skin: such are the Pediculus humanus corporis, P. capi- 

 tis, P. pubiSj Pulex irritans, P. penetrans, and the Jlcarus 

 scabiei or sarcoptes. 



Other insects are deposited under the skin and in the mu- 

 cous cavities, in the state of eggs, develope themselves in the 

 state of larvae, and come out afterwards: such is the Oestrus, 

 so common in the horse, the ox, the sheep, and which has 

 been found also under the skin of man and in the sinus of the 

 face. Larvae of the genus Musca and of some others, deve- 

 lope themselves also sometimes in the auricular passage of 

 children which are not kept clean, at the surface of ulcers, &c. 

 We must not forget that many cases of larvae excreted should 

 be referred to deceptions or fortuitous cases. 



861. Certain other animals penetrate, in the adult state, 

 into the mucous cavities of the body, remain there a greater 



