86 The Timbers of British Guiana. 



red " (20); well, but not sharply defined from the Sapwood; sur- 

 face dull. Sapwood brown, width about 2 ins. 



Bark. About J in. thick, reddish brown, corky, fissured; scal- 

 ing in thin flakes ; dark brown, fibrous, crumbling within and full of 

 lighter coloured, harder needle-like bodies. Surface of log beneath 

 bark, smooth or striated. 



Uses, Qualities, etc. " Is used for planking punt-bottoms, and 

 should do for sleepers. Is readily procurable in logs up to 35 ft. 

 in length, squaring from 12-H ins." (2). "Plentiful grows to a 

 large size ' ' (20) . Difficult to split ; saws easily ; takes nails fairly 

 well ; planes and turns moderately hard but badly ; polishes indiffer- 

 ently. Of little export value, though of fairly good colour and 

 appearance, and should be useful for many purposes. It is used 

 for spokes in Brazil. Specimen was somewhat unsound but free 

 from grit. Sometimes confused with Carapa, Nos. 14 and 15, on 

 account of similarity in colour, and appearance generally, and with 

 Urucu by name. 



Authorities. 0. Allemao, p. 31. 2. Bell, p. 9. 9. Dalton, 

 p. 214. 12. Hawtayne, p. 386. 17. Laslett, p. 453. 20. McTurk, 

 p. 5. 27a. Stone, XX. (not described). Allemao says that this 

 species is much different to the Urucururana of Southern Brazil. 



ANATOMICAL CHARACTERS. 



Similar to those of Carapa (cf. No. 14, Frontispiece). 



Transverse Section. Rather darker than the other sections. 



Pores. Readily visible to the unaided eye as pin holes, dimin- 

 ishing considerably towards the close of the season's growth, great 

 variation in regular order; unevenly distributed, being crowded in 

 some zones and rare in others. They have the appearance of being 

 inverted in order, i.e., the small Pores in the inner or earlier 

 portion of the ring, and the larger in the outer part. 



Bays. Visible with the lens, very fine; slightly avoiding the 

 Pores; hoary in colour. 



Rings. Apparently well defined ; boundary a zone of wood 

 poor in Pores contrasted with the adjoining zone where they are 

 abundant; contour regular. 



Soft Tissue narrowly sheathing or encircling the Pores. 



Pith.( ?) 



Radial Section. Very plain. Rays almost imperceptible on 

 account of lack of contrast, prominent in the Sapwood or when 

 moistened. Pores coarse; clearly-cut grooves giving the section a 

 very grainy appearance. 



Tangential Section. Unlike the Radial as the alternate zones of 

 Pores and Pore-less wood cause a banded appearance. The direc- 

 tion of the Pores is oblique and reversed from time to time. 



Type Specimens. Authenticated by Bell, No. 84/2740. Imp. 

 Inst., No. 2642. The latter is, however, of greatly superior 

 quality. Rodway mentions " Suradanni " under the name of 

 Hieronyma laxiflora. Muell. 



