58 The Timbers of British Guiana. 



shafts average height 90 ft., and will square 22 ins. " (20). Hard 

 to saw. Fissile, takes nails badly; planesi very badly; turns hard 

 and badly; very cross-grained and troublesome. It should make 

 good paving blocks. 



Authorities. 1. Aublett. 2. Bell, p. 7. 3..Berkhout, p. 22. 

 to. Boulger, pp. 423, 425. 12. Hawtayne, p. 386. 16a. Kew 

 Guide, p. 38. 17. Laslett, p. 450. 18a. Lindley, p. 1158. 20. 

 McTurk, p. 5, Martin-Lavigne (20c), p. 105. 21. Miers. 28. 

 Wiesner, p. 90. 



ANATOMICAL CHARACTERS. 



The same as those of Trysil, No. 55, and No. 39, Frontispiece,, 

 with the following differences : 



Transverse Section. The Rings are apparently well defined; 

 boundary (?) a rather broad zone, poor in Pores here and there. 

 Soft tissue in broad borders of light colour around the Pores, some- 

 times connecting two or more groups. 



Radial Section. The Pores are fine to medium scratches, 

 usually obscured by the hoary Soft Tissue; sinuous; often contain 

 gum. The Rays are minute, semi-transparent, inconspicuous 

 flakes. The Rings are scarcely indicated. 



Tangential Section as the Radial, but the Rays, on account of 

 their alignment, create the appearance of fine shading or " half- 

 tone" on the surface. They are about '25 m/m. high. 



Type Specimens. Authenticated by Bell, No. 58/2712. 



57. NOT IDENTIFIED. 



Alternative Names, " KURAHARA, KURAHURA " (2). 

 No. 57, FRONTISPIECE. 



Salient Features. A reddish or reddish-brown, lustrous wood 

 of uniform colour. Very cross-grained, rather soft and of medium 

 weight. 



Physical Characters. Weight (so far recorded), 50| Ibs. per 

 cubic ft. Hardness, Grade 6, firm; compare Beech. Smell or 

 taste 0. Surface bright. Heartwood not well-defined from the 

 Sapwood; darkens a little on exposure to the air. Colour of 

 Sapwood the same but lighter; width about 1| ins. 



Bark. About J in. thick, rough, fissured, corky and scaling. 

 Scales soft, red in section and laminated. Innermost layer of Bark, 

 laminated, showing silver-grain (Rays) in Radial Section. Middle 

 layer /, T in. thick, firm, dark brown. Surface of log beneath Bark 

 ribbed or grooved. 



Uses, Qualities, etc. " Used for making corials and boards for 

 punts and ballahoes. Readily procurable in logs up to 50 ft. in 

 length, and squaring up to 20 ins." (2). Saws easily. Fissile, takes 

 nails badly; turns moderately easily but badly; polishes indiffer- 

 ently. A wood of good appearance which should compete with the 

 inferior grades of Mahogany. 



Authority. 2. Bell; p. 7. 12. Hawtayne, p. 386. 



