SYSTEMATIC HISTORY OF THE INFUSORIA. 



DiscocEPHALUS votatovius (XXV. 345, 

 346). — Transparent; head smaller than 

 the body ; mouth romided at both ends. 



(xxv. 345 is an imder-, and xxv. 346 a 

 side-view.) In the Ked Sea. 1-380". 



Genus HIMANTOPHORIJS (XXV. 347, 348).— Distinguished by the 

 absence of styles and teeth, by having numerous uncini, and by the head 

 not being distinct from the body. The long bent hooks, generally in pairs, 

 appear like a broad band upon the under side, and serve as organs of loco- 

 motion ; near them is a row of cilia extending from the mouth to the middle 

 of the body. The mouth, discharging orifice, and numerous vacuoles are 

 distinct. At the posterior margin is a large contractile vesicle ; between the 

 row of cilia and margin on the right is a series of glandular (?) spots. Self- 

 division has not been observed. 



HiMANTOPHORUS CharoH (M.) (xxv. 

 347, 348). — Transparent, flat, elliptical, 

 anteriorly slightly truncated obliquely ; 

 cilia short, micini short and slender. The 

 mouth commences anteriorly, at the 

 lower angle of the triangular bright spot ; 

 but the true oesophageal opening appears 

 to be within the curved lorica, at the 



end of the dorsal row of cilia ; the anal 

 opening is near the base of the last 

 cluster of fom' to six comb-like uncini, 

 which supply the place of styles, (xxv. 

 347 is a side-, and xxv. 348 an imder- 

 view.) In stagnant water and ponds, 

 amongst decayed leases. 1-180". 



Genus CHLAMIDODON (XXV. 349).— CHiated mouth, provided with 

 teeth ; styles and uncini absent ; an oval transparent lorica or shield covers 

 the back, and projects around it; a margin of cilia surrounds the body; they 

 are longer near the brow; short climbing setae probably exist posteriorly 

 between the cilia. There are distinct vacuoles, as also vesicles containing a 

 beautiful rose-coloured fluid ; the mouth has a hollow cylinder of wand-like 

 teeth. Internally are minute green granules and a large, oval, bright central 

 nucleus. Self- division unknown. 



Chlamidodon J/wemos?/we (xxv. 349). 

 — Flat, elliptical, sometimes dilated an- 

 teriorly, as shown at xxv. 349. It is of 

 a clear green or hyaline hue, with bril- 

 liant rose-coloured vesicles; delicate 

 longitudinal lines are seen upon the sur- 



face of the animalcule, and appear to be 

 situated on the lorica. Ehrenberg counted 

 sixteen wand-like teeth, disposed C3'lin- 

 drically. The movement is quick and 

 powerfid, as in Miplotes. With Zostera 

 and Scytosiplion. 1-570". 



Genus EUPLOTES (XXV. 350-353).— Locomotive organs highly deve- 

 loped and various, in the form of cilia, styles, and uncini, but teeth wanting. 

 Digestive vacuoles have been filled in four species with coloiu'ed food ; the 

 termination of the alimentary canal is indicated in one species by the dis- 

 charge, in the rest by the projection of the little shield ; the digestive juice 

 is coloiuiess ; oval or round simple nuclei occur in three ; a single contractile 

 vesicle exists in five, and in a sixth two such. Self- division, transverse and 

 longitudinal, has been observed in one species, and transverse only in two or 

 four others. (See general remarks, p. 645 ; and Plcesconia, p. 647.) 



Perty makes the remark that some of the assumed species of EupJotes may 

 be modifications of the same being, due to pressure between the glasses 

 during examination, since the so-called lorica is only relatively hard. The 

 lorica has the form of a carapace or shield, covering only one surface, lea\4ng 

 the under one free. '' The styles, which are trailed along, are," says Lach- 

 mann, ^' split up at the apex into as many as eight parts in many species,— 

 e. cj. in E. Patella, in which, too, one style bears a number of small lateral 

 branches.'' 



