4 ENTOZOA FOUND IN MAN. 



in a state of decomposition, in the wHte matter which 

 collects about the teeth,^ etc. 



(6.) Genus Vibrio. — The microscopical parasites 

 belonging to this genus are found in the evacuations 

 of persons suffering from cholera and from diarrhoea, 

 in putrescent urine, and in the purulent discharge of 

 balanitis, and of leucorrhoea. 



2. Monades. — Protozoa which have a fixed form, 

 either round or oval ; their bodies are of a homo- 

 geneous appearance, without any distinct integument, 

 and are capable of adherence to surrounding objects ; 

 they have no visible intestine nor mouth ; one or 

 more flagelliform filaments serve the purpose of 

 locomotory organs. 



Tliree genera of the monades have been observed 

 in relation with the human subject. 



(a.) Genus Monas. — Body naked, of a rounded or 

 oblong form, with variable expansions ; possesses a 

 single flagelhform filament. Has been observed in 

 the urine of persons suffering from cholera. 



(6.) Genus Cercomonas. — The body is of a 

 roundish or oval form ; it possesses an anterior flagel- 

 liform filament, and also a posterior prolongation, of 

 variable length, which is more or less filiform, and 

 sometimes adheres to surrounding objects so as to 

 momentarily fix the position of the animal. 



There are two varieties, or species, of the Cerco- 

 monas found in connection with the human subject. 



^ Kiichenmeister doubts the existence of the animalcules said 

 by some writers to exist about the teeth, and he thiuks that there 

 is some confusion between them and the buccal Algae, or spores. 

 Kcinus, who gave the name of Denticola Hominis to the para- 

 site which is found in this locality, states that he has often met 

 with it, and especially in hollow molar teeth. 



