Dixon — Mahogany, Recognition of some Different Kinds. 453 



Total width in 2 mm. = 0-40 mm. Height = 0-40-0-50 mm., 2-18 cells. 

 Width =001-0-02, 1-, (2-) ply. Margin undefined; cells oval with black 

 contents. 



R.S.— Bay cells short, rectangular pitted. — Fibres non- septate. 



Cp. note to 8. 



10. Mimwops glohosa. 

 No. 163 from the Botanic Gardens, Georgetown, Demerara, labelled 

 " Bullet Tree (Mimusops glohosa, Gaertn)." PI. XXVII., figs. 31, 32, 33. 



Pink brown, dull, not roey. Vessels not zoned, in narrow radial groups, 

 straight, or somewhat sinuous, opaque among translucent dark fibres. 

 Parenchymatous laminae very fine and close, 5-7 to 1 mm.; occasional 

 zones where they are more sparse. Ptays very fine and inconspicuous. 

 Sp.gr = 0-9-1-0. 



C.S. — Vessels distorted or angular, in radial groups of 2-10, 

 M.T.D. = 0-08 mm. ; 25-30 groups in 2-mm. field ; empty. — Fibres very 

 thick-walled, lumen almost obliterated. — Circumvasal parenchyma incon- 

 spicuous ; laminar 1-2 cells thick, empty or filled. — Bays empty or filled. 



T.S. — Bays irregular in height, acute, straight, about 100-120 in 2-mm. 

 field. Total width in 2-0 mm. = - 35 mm. Height = P0 mm.-0 - 05 mm. 

 Width = 0008-0-024 mm., 1-, 2-ply. Margin 1-8 cells deep, rays often 

 rat-tailed, filled. Middle cells small, filled. 



U.S. — Parenchyma in regular vertical series of elongate rectangular cells, 

 tilled or empty. — Bays with margin of erect rectangular thick-walled pitted 

 cells, and sometimes with a fringe or inner margin of square similarly 

 thickened cells. Inner cells procumbent, also thickened; all usually filled 

 and dark. Pits very distinct. — Fibres non-septate. 



Note. — This wood is listed by Mell among the woods called " mahogany." 

 However, the samples I have seen of it do not display the play of light 

 characteristic of mahogany, and its microscopic structure diverges very much 

 from that of Svnetenia mahagoni. 



11. Turihalli. 

 No. 188. Specimen from Dublin National Museum, labelled " Turiballi, 

 Uriballi or Eurebally, or Guiana mahogany." PL XXVII., figs. 34, 35, 36. 



Bosy brown, lustrous, roey ; fibres distinctly zoned ; vessels not zoned, 

 with occasional white or black deposit. Parenchymatous laminae absent. 

 Bays fine. Sp. gr. = 0-85. 



C.S. — Vessels rounded, scattered, M.T.D. = 0*12 mm., about 35 groups 



