KoJpOflcil .] INFUSORIAL ANIMALCULES. 583 



Family.— KOLPODEA. 



Animalcules furnished with an alimentary canal, the orifices of 

 which are not at opposite extremities of the body. They have no 

 shell or lorica ; they are furnished with cilia disposed in longitu- 

 dinal sei'ies, which are subservient to locomotion and purveyance. 

 In all of them, numerous digestive cells have been demonstrated by 

 means of coloured food, as likewise both orifices of the alimentary 

 canal; the digestive juice (bile) is colourless. The ova are scattered 

 and numerous ; in the genus Kolpoda expulsion of the ova has 

 been seen. The male generative structure is of a double kind, and 

 complete self-division is frequent, but no formation of clusters or 

 gemmae is seen. A sensitive system is indicated in one genus 

 {Ophryoglend) by the presence of a visual point. 



The genera are disposed as follows : — 



{absent on the back Kolpoda 

 present every where Paraniecmm. 



Eye absent. «v 



I No tongue i 



*- 1. wi' 



with taO and proboscis Amphileptus. 



vith tail, no proboscis Uroleptus. 



Eye present Ophrj'Oglena. 



Genus Kolpoda. The bosom Animalcules,. — Body ovoid, some- 

 times reuiform, anteriorly with a little tongue-like member ; under 

 surface furnished with cilia (none on the back) ; no eye. Their 

 motion is not active, the cilia being few. The mouth, posterior 

 termination of the alimentary canal, and numerous polygastric 

 cells, may be demonstrated in one species by coloured food. The 

 mouth and discharging orifice are both on the ventral surface, the 

 former having a protruding tongue-like member. The ova occur in 

 delicate strings, forming a sort of network ; their exclusion has 

 been seen in one species ; a bright contractile round vesicle is ob- 

 servable in two species, and in another species two vesicles or 

 sexual bladders are present. A large round or oval gland in the 

 centre of the body has been seen in two species. Transverse and 

 longitudinal self-division has been noticed by several observers, and 

 in K. cucullus a skin or envelope. 



