476 Scientific Proceedings, Royal Dublin Society. 



C.S.— Vessels somewhat compressed tangentially, isolated. M.T.D. 

 = 029 mm. About 30 in 2-mm. field. Usually filled with tyloses and dark 

 deposit. Fibres thick-walled, with much reduced lumina in irregular patches, 

 6-24 fibres in radial thickness, and of greater extension in a tangential 

 direction. Parenchyma also in irregular patches, sometimes surrounding 

 vessels and extending considerably in a tangential direction, or sometimes 

 forming narrow incomplete circumvasal sheaths. Cells of parenchyma and 

 fibres form fairly regular radial series. Some cells of parenchyma contain 

 dark deposit. Kays conspicuous, with dark contents, often markedly deflected 

 by vessels, of two sizes, 2 or 3 small rays between large ones. 



T.S. — Rays irregular in size and arrangement, roughly of two grades, wide 

 and narrow. About 5 wide and 33 narrow in 2-mm. field. Total width in 

 2 mm. = - 64 mm. Height of large rays = 1*15 mm., of small rays 0"40 mm., 

 45-2 cells. Width of large rays = 01 2-0-1 5 mm. Eays 1-, 2-, 3-, 4-, 5-, 6-, 

 7-, 8-ply. Margin indistinct, marginal cells of large rays, and all of the cells 

 of small rays somewhat larger than inner cells of large rays. All cells filled. 

 — Fibres pitted, 2-4 between rays. 



R.S. —Marginal cells square or even palisade-like. Inner cells radially 

 elongate. Cells of small rays resemble marginal cells. 



Note. — This wood agrees with that of Bipterocarpus tuberculatus in many 

 particulars, as given by Gamble (8). 



42. Camphor wood. 

 No. 237, from commercial source, labelled " Camphor wood."- PI. XLIIL, 

 figs. 127, 128, 129. 



Rose-brown, dull, with indistinct, close, dark, and light zones ; about 6-8 

 in 10 mm. Hard ; end grain cuts with polish. Scented, roey. Narrow, 

 discontinuous laminae very close. Distinct parenchymatous laminae 

 occasional ; 1 in 55 nim. Sp. gr. = 0'87. 



C.S. — Vessels rounded, isolated, or in pairs. M. T. D. = 0*25 mm. ; about 

 20 in 2-mm. field. Large tyloses, each filling the lumen of a vessel, frequent. 

 Fibres thick-walled, lumen usually obliterated, pitted. 6-20 between rays. — 

 Circumvasal parenchyma thin ; often short, tangential laminae traversing 

 the groups of fibres between the rays. 1 cell thick, radially. — Rays 

 conspicuous, dark. 



T.S. — Rays irregular in size and arrangement ; about 30 in 2-mm. field. 

 Total width in 2 mm. = 0-63 mm. Height = 0-08-1-0-2-0 mm. ; 2-80 cells. 

 Width = 0-02-0-06-0-08 mm. 1-, 2-, 3-, 4-, 5-ply. Margin usually distinct, 

 often many cells deep ; 1 cell thick. All ray-cells usually with parietal 

 contents. — Wood parenchyma cells rectangular. 



