CILIARY, 



[ 1T7 ] 



CIMEX. 



of (Edogonmm bear a crown of vibratile 

 cilia, aud the groat elliptical zoospore of 

 Vnucheria is clotlied with them over its 

 ■whole surface. In the Volvocinea^, tliere is 

 a pair of cilia attached, just like those of 

 zoospores, to each niemher 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 sul)- 

 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 cles Algues, ^-c, 

 Ann. cles Sc. Koi. 3 ser. xiv. & xvi. ; Anthe- 

 ridies des Fonc/eres, Ann. Sc. N. 3 ser. xi. 

 5 ; Hofmeister, Vergleich. Unfersuch. ^-c, 

 Leipsic, 1851 ; linger, Die Pfianze im Mo- 

 mente der TJiierwerdimg, 34, Vienna, 1843 ; 

 Al. Braun, Verjiinynng, 8(c. {jRay Soc. 1853) ; 

 Cohn, ProtococcKs pluvialis, Nova Acta A. L. 

 C. C. xxii. 735 {Bay Soc. 1853, 352) ; on 

 SfephanospJicsra, Siebold & Kolliker's 

 Zeitschr. iv. 77 {Ann. N. II. 2 ser. x. 321) ; 

 Henfrev {Ferns), Linn. Tr. xxi. ; Focke, 

 Physiol. Studien ; Sachs, Bot. 244. 



CILIARY PROCESSES. See Eye. 



CILTOPHRYS, Cienk.— A genus of 

 Actinophryina. C. infnsiomim, resembles 

 Act. sol, but is much smaller ; produces 

 swarm-germs ; in the scum of old infusions. 

 (Cit-nkowski. Schnitzels Arch. 1876, xii. 29.) 



CIMEX, Linn. (Bug). — A genus of In- 

 sects, of the order Hemiptera, suborder 

 Heteroptera, and family Cimicid^e. 



Char. Antenn.ie four- jointed ; labium 

 three-jointed, the basal joint the longest; 

 thorax subluiiate, not transversely divided ; 

 abdomen much depressed, and more or less 

 orbicular ; elytra reduced to a pah' of short, 

 transverse, scale-like pieces ; wings none ; 

 legs moderately long and slender ; tarsi 

 three-jointed. 



C. lectularius (the bed-bug). Ferruginrms- 

 ochre ; thorax deeply emarginate, its sides 

 retlexed ; abdomen suborbiculate, acute at 

 the apex ; third joint of antenna3 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 (PI. 33. fig. 27 a), and two others 

 extremely slender and very finely serrated 

 near the ends (PL 33. fig. 27 b) ; these are 

 about 1-20,000" in breadth at the sen-ated 

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

 Ijreadth 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, 

 aud opening between the hind legs. The 

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

 o^-al, elegantly pitted, and terminated by a 

 lid, which breaks off" when the yoimg 

 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. columliarius (Bug of the pigeon). 

 Ferruginous-ochre ; thorax deeply emar- 

 ginate, sides reflexed ; abdomen orbicular, 

 subacute at the apex ; third joint of an- 

 tennre 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 s'hort, tliird aud fourth 

 joints nearly equal; length about 1-7". 

 Found in swallows' nests. 



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

 nuus-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. 



Megnin maintains that these all belong 

 to C. lectularius. 



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



