Back- cavity 



(ADDITIONS) 



biophagous 



Back-cav'ity, the inner cavity of a 

 stoma ; in Germ. "Hinterhof." 



bacteria'ceous, relating to bacteria ; 

 bacterici'dal (-cida = killer), ger- 

 micidal, destructive of bacteria ; 

 Bacte'rioblast (pXacrTos, a bud), ap- 

 plied by Winkler to gelatinous 

 bodies, homogeneous at first, then 

 in succession finely-, and coarsely- 

 granular, at last becoming detached 

 bacteria. 



Balanoph'orin, a waxy substance 

 which occurs in quantity in the 

 stems of certain species of Langs- 

 dorffia, a genus of Balanophoreae, 

 whence the name. 



ballis'tic, or balis'tic (/JciAAw, I ex- 

 pel) Fruits, used by Kerner to 

 describe those fruits which dis- 

 charge their seeds elastically ; cata- 

 pult-fruits. 



Bark - parench'yma, the same as 

 cortex-parenchyma. 



taasid'ial, relating to a BASIDIUM ; ~ 

 Lay'er, the structure in Agarics 

 which produces or bears the 

 basidia ; Basidioli'chenes, Lichen- 

 forming Basidiomycetes ; Basid'- 

 ium, add, (2) employed by Thaxter 

 for the swollen attachment of the 

 conidium to the conidiophore in 

 Basidiobolus, Eidam. 



basiplas'tic (TrXatrro?, moulded), 

 Prantl's term for those leaves 

 whose permanent tissae appears 

 first at the apex, the lower portion 

 continuing longer as meristem. 



Bast-i'slands, another name for 

 PHLOEM-ISLANDS ; ~ Nerves, libri- 

 form cells in the leaf of Najas 

 graminea, Delile ; ~ Parench'yma, 

 phloem parenchyma ; <~ Rays 

 MEDULLARY RAYS. 



Bath'mism (/Jafyus, a step or degree), 

 Cope's term to denote the force or 

 energy of growth. 



bay, dun-colour ; an equivalent of 

 BADIUS. 



Beglei'ter (Ger., companion) Cells, 

 small groups of thin-walled cells 

 associated with DEUTER CELLS, and 

 probably serving as conductors of 

 water (Limpricht). 



Benth'os (fievdos, depth, bottom), the 

 vegetation at the bottom of the 

 sea, lakes, or streams ; the fixed 

 growth as distinct from the plank- 

 ton or floating growth. 



ben'zoloid, a group of scents de- 

 rived from aromatic bodies, as 

 eugenol or oil of cloves, and in the 

 flowers of Heliotrope, Lilac, etc. 

 (Kerner). 



Berge'ria, formerly considered a 

 genus of fossils, now applied to a 

 lepidodendr;jid stem when the 

 epidermis has been stripped off 

 (Scott). 



Ber'ry-cone, a cone whose scales have 

 become fleshy and fused, as in 

 Juniperus. 



Bet'ulase, the same enzyme as GATTL- 

 THERASE, but obtained from the 

 bark of Betula lenta, Linn. 



Biastrep'sis (/Sia'w, I force, crrpef is, the 

 act of turning), (1) C. Schimper's 

 term for TORSION ; (2) the transi- 

 tion from decussate to spiral 

 phyllotaxis (De Vries). 



biax'ial (+ Axis), used of a spore 

 germinating at both ends (S. 

 Moore) ; Bicar'pals, proposed by 

 Bessey for the Bicarpella'tae of 

 Beutham and Hooker, a series of 

 gamopetalous Phanerogams (cf. 

 Gen. PI. ii. pp. vi-vii.) ; the latter 

 term also used by Boulger to 

 embrace the majority of Gamo- 

 petalae with Umbelliferae ; bicar'- 

 pellate, having a two-celled fruit ; 

 bicel'lular, of two cells ; Bilat'eral- 

 ism (latus, lateris, a side), having 

 similar or bilateral symmetry, 

 taken by L. H. Bailey as the type 

 of animal evolution. 



Biochemist, an expert in the 

 chemistry of living organisms ; 

 Biochemistry, the branch of 

 chemistry concerned with biology. 



biological Spe'cies, those species 

 which differ only by their physio- 

 logical behaviour, being morpho- 

 logically identical ; Bioph'agism 

 ((pdyu, I eat), the absorption and 

 digestion of the matter of living 

 organisms (Boulger) ; adj. bioph'- 



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