BEACHIONUS. 



[ 119 ] 



BRANCIIIPUS. 



Genera : 



Eye-apot3 absent ; foot forked Nofeus. 



( J foot absi-nt Anuria. 



. I °°e I f,,^|. f^,j.].p,:, Bmckionus. 



Eye-spots present^ ^ j.^^^ ^^j^^^^^ Fompholyx. 



^two -^ j.^g^ styliforin .. Pterodina. 



See IIydrocora and Dipodina. 



BRA'CHIONUS, Hill.— A genus of Ro- 

 tatoria, of the family Bracliionaja. 



Char. A single eye-spot at the back of 

 the head ; foot forked. 



The anterior margin of the carapace is 

 furnished with teeth, as in some species is 

 the posterior margin also. 



B. amphiceros (PI. 43. fig. 8). Carapace 

 smooth, furnished both at the anterior and 

 posterior margin with four teeth ; aquatic ; 

 length 1-70". 



B. ruheiis. Carapace smooth, with six 

 acute teeth in front, and rounded posteriorly; 

 body reddish ; aquatic ; length 1-50" : teeth, 

 PI. 43. fig. 9. 



Eleven other species have been described; 

 some of them freshwater, others marine. 



BiBL. Ehrenb. /»/".; Dujardin,/Mf.; Gosse, 

 Ann. N. H. 1851, Viii. p. 202; Cbhn, Sii^. 

 8,- KnUih. Zeit. vii. p. 459. 

 BRACHYCLA'- 

 DIU]\[,Corda. — A genus 

 of Dematiei (Hyphomy- 

 cetous Fungi), not se- 

 parated by any marked \^'; 

 characters from Den- 

 DTtYPHiUM ; forming a 

 delicate mould on dry 

 stems of herbaceous 

 plants. The filaments 

 and branches are formed 

 of squarish cells, swollen 

 so as to produce a moni- 

 liform appearance, the 

 walls being thick and 

 coloured. 



The so-called species 



are probably stages of An crert, filament with 

 A«r>nnivppfmi<? Fiino-i fertile branehes. 



ASCOm^ Cetous r ung l. Magnified 200 diame- 



B. jyenicillatum, Lorda, ters. 



is said to extend over 

 stems, sometimes in tracts a foot long ; the 

 filaments and branches are blackish, the 

 spores white (fig. 79). 



B. Tliomasinum has been found in amber. 



BiBL. Corda, Ic. Fung. ; Fries, Summa 

 Veq. p. 504. 



BRACHYCO'LUS, Buckton.— A genus 

 of Aphidye. 



B. stellarice. Body mealy, very long and 

 narrow. On Stellaria Jwlostea and HuJcks 

 mollis. 



BrachycladI um peni- 

 cillatum. 



BiBL, Buckton, Aphides ( Ttay Soc ), ii. 

 p. 146. 



BRA'CIIYODUS, Nees.— A genus of 

 Leptotrichaceous Mosses, separated from 

 Gyninostommn or Weissia of some authors. 



BiBL. Wilson, Bn/ol. Brit. p. 52. 



BRACIIYSTE'LIUM, Reichb.— A ge- 

 nus of Orthotrichaceous Mosses. 



Braclujstelium 'polyphylhim, IIscli., = 

 Pti/chondtrium pohiphyllus, Br. and Sch. 



BiBL. Wilson, Bn/'ul. Brit. p. 173. 



BRACHYTHE'CIUM, Br. and Sch.,= 

 Hypnum. 



BiBL. Wilson, Bryol. Brit. p. 337. 



BRA'DYA, Boeck.— A genus of Ento- 

 mostraca (Copepoda). 



B. typica. Anterior autenuiB very short, 

 7-jointed. Scilly Isles. 



BiBL. Brady, Copepoda (Ray Soc.) ii. 

 p. 16. 



BRADYCINE'TUS, Sars.— A genus of 

 Eutomostraca, of the order Ostracoda (sec- 

 tion Myodocopa) and family Cypridinidee. 

 Characterized by the 2-branched lower 

 autenniB, and the one pair of feet. B. brenda 

 = Ci/pridina brenda, Baird; B. Macandrei 

 = Ci/p. Mac. B. 



BiBL. Brady, Linn. Trans, xxvi. p. 466. 



BRAIN. See Nerves. 



BRAl'NEA, Hook.— A genus of Gram- 

 mitidete (Polypodiaceous Ferns), with con- 

 tinuous sori along transverse veins near 

 the midrib, produced along the veins to- 

 wards the edge of the frond. 



The single species, B. insiynis, is found at 

 Hong Kong &c. 



BiBL. Hooker, Si/n., p, 390. 



BRAN. See Corn. 

 BRAN'CHM^. — This term is synonym- 

 ous with gills. The latter term, however, 

 is usually applied to the aquatic respira- 

 tory organs of fishes, whilst those of other 

 animals retain the name of branchife. Their 

 structure is described with that of the re- 

 spective classes in which they occur. See 

 also Ephemera and Libellulid^. 



BRAN'CHIPUS, Schfeffer {Chiroce- 

 phalus). — A genus of Eutomostraca, of the 

 order Phyllopoda, and family Branchipo- 

 didae. 



Char. Abdomen prolonged in the form 

 of a tail, composed of nine segments or 

 joints, the end joint -^^dth two well-deve- 

 loped plates or lamellar appendages ; supe- 

 rior antennae, in both sexes, slender, fili- 

 form, and many-jointed; inferior antenniB 

 in the male large, curved downwards, two- 

 jointed, furnished at the base with fan- 



