116 



RELATIONS OF THE POLYGASTRICA 



f self-division f 'llo^icated or shell-less Mouadina 

 complete ( loHcated or shelled 



Body 



destitute 



of upiiendaires. 



(No foot-like 



jjrocesscs). 



Gymnica. 



Foot-like pro- 



cesses 



variable. 



Pieudopoda. 



Hairy 

 Epitricha. 



One receiving 



and discharging 



orifice only for 



nutrition. 



Anopisthia. 



Two orifices 



one at 



each extremity'. 



JEnantiotreta. 



Form of 



body 

 constant 



Oyptomonadina 

 f illoricated Hydromorina. 



self-divison 

 incomplete 



hence 



formed in 



clusters 



self-dividing on all 

 sides (globular 



self-dividing 

 unilaterally 



, (filiform) 



Volvocina. 

 illoricated Vibrionia. 



. kiricated Closterlna. 



Form of r 



body < 



. variable ( 



Form of ( illoricated Astasiaea. 



loricated Diuobryina. 



' illoricated Amoebaea. 



loricated 



f compound foot-like process from one ) Aycpllina 

 ' aperture j Arceuina. 



simple foot-like process from one or It. •,, • 

 from each aperture | aacuiaria. 



illoricated Cyclidina. 



loricated Peridinaea. 



illoricated Vorticellina. 



loricated Ophrydina. 



illoricated Enchelia. 



loricated Colepina. 



Orifices situated iHoricated 



obliquely 

 Allotreta. 



Orifices 

 abdominal. 

 Catoireta. 



mouth furnished with proboscis, tail ) t,.„„u„,- „ 

 absent ] nacneiina. 



mouth, anterior, tail present Ophryocercina. 



Lloricated Aspidiscina. 



f ( locomotive organs cilia Kolpodea. 



I illoricated ' 



various Oxytrichina. 



(.loricated Euplota. 



Pamilt— MONADINA. 



The animalcules of the family Monadina are the most minute hving 

 creatures which have been discovered by man. They are destitute 

 of an alimentary canal ; are illoricated or shell-less, and have an 

 uniform body without any appendages issuing from it, cilia not being 

 considered as such. They increase either by a simple and complete 

 self-division of the body into two, four, or more individuals. The 

 uniformity or unvarying appearance in their external forms may be 

 considered as one of the principal characteristics of this family ; for 



