Dtxon — Mahogany, Recognition of some Different Kinds. 447 



WESTERN MAHOGANIES. 



1. Swietenia mahagoni. 9. Lysiloma sabicn. 



2. Swietenia macrophylla. 10. Mimusops globosa. 



3. Cedrela odorata. 11. "Turiballi." 



4. Carapa guianensis. 12. " Dalli." 



5. Carapa sp. 13. " Guatemalan mahogany." 



6. Protium altissimum. 14. " Cedrana." 



7. Cariniana pyriformis. 15. " Panama mahogany." 



8. Hymenoea eourbaril. 



1. Swietenia mahagoni. 



No. 78 from commercial source, labelled " St. Domingo mahogany." 



No. 81 „ „ „ " Cuban mahogany." 



No. 156 „ the Colonial and Indian collections of the Imperial Institute, 

 London, labelled " Cuban mahogany." 



No. 48 from commercial source, labelled " Cuban mahogany." PI. XXII , 

 figs. 1, 2, and 3. 



No 45 from commercial source, labelled " Cuban mahogany." PI. XXII., 

 fig. 5. 



No. 79 from old house. 



No. 80 „ old Dublin escritoire. 



No. 53 „ commercial source, labelled " Spanish mahogany." 



JNo. oo „ ,, „ ,, 



Microscopic preparation by Norman. 



Preparation by Nordlinger, labelled " Swietenia mahagoni." 



Small branch from Trinity College Herbarium, labelled "Swietenia mahagoni 

 Linn., Haiti, 1842." PL XXII., fig. 4. 



Dark red or rosy brown ; lustrous and roey. Vessels indistinctly zoned, 

 with black or white contents. Parenchymatous laminae 1/5 mm-15 - mm. 

 apart. Sp. gr = 0-84-0-68. 



C.S — Vessels mostly isolated, or in small groups, M.T.D. = O'lonim.- 

 - 34 mm., 12-40 in 2-mm. field, often filled with dark contents, and frequently 

 with white (calcium carbonate). — Fibres moderately thick-walled. Lumen 

 not obliterated. — Circumvasal parenchyma, seldom more than 1 cell thick, 

 inconspicuous ; laminar parenchyma 1-12 cells thick, sometimes containing 

 intercellular spaces, containing dark substance, in tangential series. 



T.S. — Ptays usually of uniform size and regularly arranged, sides bowed, 

 35-70 in 2-mm. field. Total width of rays in 2 mm. = - 40 mm.-080 mm. 

 Average height = 0'33 mm.-0 - 48mm. Average width = 0'035 mm.-009 mm. 



SCJENT. PROC. R.D.S., VOL, XV., NO. XXXIV. 4 B 



