CILIARY. 



[ 177 ] 



CIMEX. 



of (Edoffonium bear a crown of vibratile 

 cilia, and the great elliptical zoospore of 

 Voucheria is clothed with them over its 

 whole surface. In the Volvocineae, there is 

 a pair of cilia attached, just like those of 

 zoospores, to each member of the family of 

 which the compound organism is made up ; 

 and these project through orifices in the 

 common envelope, so as to render the per- 

 fect plant locomotive, while the cilia of 

 ordinary zoospores disappear when they be- 

 come encysted in a cellulose coat prepara- 

 tory to germination. The spermatozoids of 

 the Fucaceae, and the zoospores produced 

 in the sporangia of other Fucoids have a 

 different arrangement of the cilia : there 

 are always two ; but they are attached on 

 a reddish point on the side of the zoo- 

 spore, not at its apex, and one of the cilia 

 is directed forwards from the apex or beak, 

 while the other trails behind like a kind of 

 rudder. 



The mode in which these transitory cilia 

 are lost is variously stated : some authors 

 think they are retracted into the protoplasm ; 

 from what we have seen, we believe they are 

 thrown off entire. The cilia have the same 

 chemical reactions as the protoplasmic sub- 

 stance generally, and are apparently pro- 

 cesses of it; they are stained brown by 

 iodine, which also stops their motion and 

 renders them partly solid. The mode of 

 detecting and observing cilia is given in 

 the preceding article. Further particulars 

 of individual cases will be found under the 

 heads of the families and genera named above. 



BIBL. Thuret, Zoospores des Algues, $c., 

 Ann. des Sc. Nat. 3 ser. xiv. & xvi. ; Anthe- 

 r idies des Fougeres, Ann. Sc. N. 3 ser. xi. 

 5 ; Hofmeister, Vergleich. Untersuch. fyc., 

 Leipsic, 1851 ; linger, Die Pflanze im Mo- 

 mente der Thierwerdung, 34, Vienna, 1843 ; 

 Al. Braun, Verjilngung, Sfe. (Ray Soc. 1853); 

 Cohn, Protococcus phivialis, Nova Ada A. L. 

 C. C. xxii. 735 (Ray Soc. 1853, 352) ; on 

 Stephanosph&ra, Siebold & Kolliker's 

 Zeitschr. iv. 77 (Ann. N. H. 2 ser. x. 321) ; 

 Henfrey (Ferns), Linn. Tr. xxi. ; Focke, 

 Physiol. Studien ; ' Sachs, Sot. 244. 



CILIARY PROCESSES. See EYE. 



CIL'IOPHRYS, Cienk. A genus of 

 Actinophryina. C. infusionum, resembles 

 Act. sol, but is much smaller ; produces 

 swarm-germs ; in the scum of old infusions. 

 (Cienkowski, Schnitzels Arch. 1876, xii. 29.) 



CIMEX, Linn. (Bug). A genus of In- 

 sects, of the order Hemiptera, suborder 

 Heteroptera, and family Cimicidae. 



Char. Antennae four-jointed ; labium 

 three-jointed, the basal joint the longest ; 

 thorax sublunate, not transversely divided ; 

 abdomen much depressed, and more or less 

 orbicular ; elytra reduced to a pair of short, 

 transverse, scale-like pieces ; wings none ; 

 legs moderately long and slender; tarsi 

 three-jointed. 



C. lectidarius (the bed-bug). Ferruginous- 

 ochre ; thorax deeply emarginate, its sides 

 rerlexed; abdomen suborbiculate, acute at 

 the apex; third joint of antennas longer 

 than the fourth ; rostrum inflected beneath 

 the thorax ; labrum short, broad, subovate, 

 trigonate and ciliated. 



The common bug has only three setae, 

 one stouter than the rest, and not toothed 

 or serrated (PL 33. fig. 27 a), and two others 

 extremely slender and very finely serrated 

 near the ends (PL 33. fig. 276) ; these are 

 about 1-20,000" in breadth at the serrated 

 portion (hence about the l-20th part of the 

 breadth of the lancets of the flea). The 

 female is larger and more elongated than 

 the male. The offensive odour is due to a 

 liquid secreted by a pyriform reddish gland, 

 situated in the centre of the metathorax, 

 and opening between the hind legs. The 

 eggs (PL 39. fig. 20) are white, elongate- 

 oval, elegantly pitted, and terminated by a 

 lid, which breaks off when the young 

 escape. The latter are very small, white 

 and transparent, and have a much broader 

 head, with shorter and thicker antennae 

 than the mature insect. They undergo four 

 moultings, and are eleven weeks in attain- 

 ing their full size. 



C. columbarius (Bug of the pigeon). 

 Ferruginous-ochre ; thorax deeply emar- 

 ginate, sides reflexed ; abdomen orbicular, 

 subacute at the apex; third joint of an- 

 tennas slightly longer than the fourth ; 

 length about 1-5". 



C. hinmdinis (Bug of the swallow). 

 Fusco-ferruginous ; thorax slightly emargi- 

 nate ; sides flat ; abdomen ovate, subacute 

 at apex; antennae short, third and fourth 

 joints nearly equal; length about 1-7". 

 Found in sw'allows' nests. 



C. pipistrelli (Bug of the bat). Ferrugi- 

 nous-ochre, shining; thorax deeply emar- 

 ginate, sides slightly reflexed ; abdomen 

 ovate, posteriorly attenuate ; third joint of 

 antennae longer than the fourth ; length 

 1-6". On the common bat. 



Me'gnin maintains that these all belong 

 to C. lectularius. 



BIBL. De Geer, Mem. iii. ; Dumeril, 



