CHILOMONAS. 



[ 136 J 



CHLOROCOCCUM. 



yellow, anterior end curved so as to form an 

 obtuse beak, posterior end narrowed; aquatic; 

 length 1-140". 



C. ornatus. Ovato-cylindrical, golden- 

 yellow, ends rounded, a violet spot at the 

 neck; aquatic and marine ; length 1-174". 



Dujardin admits only the first species ; 

 referring the others to the genus Nassula. 



BIBL. Ehi*. Infusionsth. p. 336; Duj. 

 Infus. p. 490; Stein, In/us, fyc. 



CHILOMONAS, Ehr. A genus of Infu- 

 soria, of the family Monadina. 



Char. No tail nor eye-spot; mouth oblique 

 or lateral, and surmounted by a lip; either 

 anterior cilia or one or two (?) very delicate 

 flagelliform filaments present. 



C. volvox. Oval, narrowed and notched 

 in front, colourless and transparent, lip long ; 

 aquatic; length 1-1400". 



C. paramecium. Oblong, keeled, trilateral, 

 colourless and opake, sometimes aggregated; 

 aquatic; length 1-1020". 



C. destruens. Oblong, variable in form 

 from its softness, colourless or yellowish ; 

 aquatic and marine ; length 1-860". 



Dujardin gives different characters : body 

 ovoid-oblong, obliquely notched in front, 

 with a very delicate filament arising from the 

 bottom of the notch. Movement by the 

 body revolving upon its centre from before 

 backwards, 



C. granulosa (PI. 23. fig. 28). Oblong, 

 broader in front, colourless, filled with 

 granules which appear to project on the sur- 

 face ; length 1 -840". In an infusion of mosses. 



C. obliqua. Ovoid or pyriform, nodular, 

 colourless, variable in form; length 1-2700". 



BIBL. Ehrenb. Infus. p. 30; Duj. Inf. 

 p. 295. 



CHIODECTON, Fee. A genus of Endo- 

 carpeae (Angiocarpous Lichens), of which 

 one species, C. (Syncesia) albida, has been 

 found in Ireland. 



BIBL. Leigh ton, Monogr. Br. Any. Li' 



is, p. 24. pi. 8. fig. 4. 9. fig. 1 ; Tulasne, 

 Ann. des Sc. nat. 3 ser. xviii. pi. 10. 



CHIOGRAPHA, Leight. A genus of 

 Graphideae (Gymnocarpous Lichens) sepa- 

 rated from Opegrapha. C. Lyellii=O. Ly- 

 ellii, Sm. 



BIBL. Leighton, Ann. Nat, Hist. 2 ser. 

 xiii. 388. pi. 7. fig. 24. 



CHIONYPHE, Thienem. A genus of 

 Mucorini (Hyphomycetous Fungi), found 

 growing upon melting snow. 



BIBL. Thieneman, Nova ActaA.L. C. C. 

 xi. 1839 ; Ann. des Sc. nat. 2 ser. xiv. 63. 



CHITINE is the horny substance which 



gives firmness to the tegumentary system 

 and other parts of the Crustacea, Arachnida, 

 and Insects ; probably also the lorica of 

 the Rotatoria consists of it. It is left when 

 the above structures are exhausted success- 

 ively with alcohol, aether, water, acetic acid 

 and alkalies, retaining the original form of the 

 texture. Itisdissolvedby concentrated mineral 

 acids without the production of colour. 

 It is not dissolved by solution of potash, even 

 when boiling. Neither does it give the 

 characteristic reactions with Millon's or 

 Schultze's tests. It contains nitrogen. 



BIBL. Odier, Mem. d. Mus. d'Hist. Nat. 

 i. p. 35 ; Lassaigne, Compt. Rend. xvi. 

 p. 1087; Schmidt, Zur Vergl. Phys. d. Wir- 

 bellos. Thiere (Taylor's Sclent. Mem. v. 

 p. 1); Payen, Compt. Rend. xvii. p. 227. 



CHLAMIDOCOCCUS. See PROTO- 

 coccus. 



CHLAMIDODON, Ehr. A genus of 

 Infusoria, of the family Euplota. 



Char. Furnished with cilia and a cylinder 

 of teeth, but neither styles nor hooks. (Oxy- 

 tricha with a lorica and teeth.) 



C. Mnemosyne (PI. 23. fig. 29). Elliptical, 

 or the anterior end broader, hence ovate; 

 green or colourless, and containing rose-red 

 vesicles ; lorica projecting beyond the body ; 

 length 1-570 to 1-240"; marine. 

 BIBL. Ehr. Infus. p. 376. 

 CHLAMIDOMONAS (PI. 23. fig. 30, , 

 b, c, d, e). See PROTOCOCCUS. 



CHLORASTER, Ehr. A genus of Infu- 

 soria, of the family Monadina. 



Char. Single, mouth (?) terminal, a single 

 frontal eye-spot, no tail, middle of the body 

 with radiate warty processes. Allied to the 

 genera Glenomorum and Phacelomonas. Does 

 not admit coloured particles. 



C. gyrans. Green, fusiform, acute at the 

 ends ; radiate processes in a whorl of four, 

 at first obtuse, then subacute ; flagelliform 

 filaments 4-5; length 1-1630"; aquatic. 



It revolves rapidly upon its axis, and 

 undergoes spontaneous division. 



BIBL. Ehr. Ber. d. Berl. Akad. 1848. 

 p. 236. 



CHLORATE OF POTASH. See POTASH. 

 CHLORIDES. See the bases. 

 CHLOROCOCCUM, Grev. A genus of 

 Palmellaceae (Confervoid Algae). 



We have assigned to this the common 

 green pulverulent stratum which is found 

 upon every old trunk, on all old palings and 

 other exposed woodwork, &c. If this proves 

 to be really a distinct plant, and not an 

 accumulation of germinating gonidia of 



