334 DESCRIPTION OF [Rotator ia. 



FAMILY XXIV. OECISTINA 



Comprise infusory animalcules which have a single rota- 

 tory organ entire at the margin, and whose bodies have an 

 envelope, or lorica. This family contains only two species ; 

 they possess an organization more developed than any we 

 have yet described. Locomotive organs, with internal 

 muscles, says Dr. Ehrenberg, and a tail-foot, not pincer- 

 like, nutritive organs, with a chewing apparatus, consisting 

 of teeth in rows, two pancreatic glands, as well as the de- 

 velopment and expulsion of ova, are observed in both. 

 Male organs, unknown vessels, two filiform tremulous or- 

 gans (gills), and nervous fibrillae, along with ganglia, are 

 elicited in Conochilus, and red visual points in both ge- 

 nera. They are thus tabulated : 



f special and distinct to each single animalcule Oecistes. 



Lorica -| 



I conglomerate, or common to many single animalcules Conochilus. 



Genus CXXX VIII. OECISTES. The sheathed little fish 

 Animalcules are characterized by each animalcule having a 

 separate lorica. They have two eyes, situated anteriorly, 

 which it is curious to notice become effaced as age advances. 

 A simple wreath of cilii is observed in the frontal region of 

 the body; the long tail-like foot has internal longitudinal 

 muscles. A simple tubular contracted alimentary canal, 

 with an elongated stomach, teeth in rows, attached to 

 two jaws, situated at the head or bulb of the oesophagus* 

 and two pancreatic glands, compose the apparatus of nu- 

 trition. The visual organs are red when the animalcule 



