EuplotaP\ INFUSORIAL ANIMALCULES. 601 



EuPLOTES striatus. — Lorica oblong, elliptical, slightly truncated 

 anteriorly, uucini only upon the posterior part of the body ; four 

 smooth striae upon the back. Found in sea water. Size l-240th. 



E. apjiendiculatus. — Lorica ovato-oblong, ends rounded, provided 

 with oblique styles, and four straight setae upon the posterior part 

 of the body. Found in sea water. Size l-240th. 



E. trimcatus. — Lorica oblong, with smooth striae, unequally trun- 

 cated, and notched anteriorly. It has setae and numerous uncini. 

 The styles are straight. Found in sea water. Size 1-2-1 0th. 



E. monostylus. — Lorica elliptical, ends rounded, no striae. It 

 has a single style, like a tail, but no uncini. Found in sea water. 

 Size 1 -400th. 



E. aculeatus. — Lorica oblong, nearly square, ends rounded ; it 

 has two crests upon the back, one bearing a little spine in the 

 middle. Found in sea water. Size l-430th. 



E. turritus. — Lorica smooth, nearly circular ; it has a long 

 erect spine on the centre of the back. Size 1-GOOth to l-430th. 



E. cimex (TricJioda cimex, M.) — Lorica oblong, elliptical, and 

 smooth, provided with cilia, styles, and uncini. Found in sea 

 water. Size 1 -430th. 



E. viridis. — Lorica large (ample), oblong, truncate in front, with 

 a central obtuse tooth, dorsum flat; ova green. Size l-480th. 

 Berlin. 



Genus Ploesconia (Duj.) — Body oval, more or less flattened, 

 enclosed by an apparent lorica, marked by longitudinal ribs, fur- 

 nished mostly on one of its plane surfaces with scattered cilia, 

 fleshy, thick, and in the form of stifi" hairs, or of non-vibi-atile 

 hooks, yet moveable, and serving the purpose of feet ; on the other 

 surface, having a row of vibratile cilia regularly placed, and be- 

 coming finer as they recede from the anterior to the posterior end, 

 where the mouth is situated, and towards which they vibrate. 



In my opinion, adds Dujardin, a Ploesconia, notwithstanding its 

 apparent complexity of structure, is yet an animal as simply 

 organised as those previously considered ; having a simple, fleshy, 

 homogenous substance, assuming during life a rather complex 

 form, which is lost at the moment of death, no membrane or fibre 

 sustaining it. The cilia or cirrhi of varied form are still of the 



