-54 The Timbers of British Guiana. 



ANATOMICAL CHARACTERS. 



Transverse Section. A trifle darker than the other sections. 



Pores. Scarcely visible with the naked eye, lacking size and 

 contrast; not diminishing towards the close of the season's growth, 

 some variation in no particular order. Evenly distributed, very 

 scarce and widely separated; single or in groups of 2-3 Pores. The 

 pairs are sub-divided Radially, as well as Tangentially. The small 

 number of Pores is an unusual feature. 



Bays. Just visible with the naked eye, lacking contrast, 

 though not very small; of one or (?) two kinds; irregular. The 

 smaller edges of the larger Kays the width of a Pore apart,- the 

 larger (or middles) 2-8 Pore-widths apart. Much denser than the 

 ground tissue, which is very coarse and lighter in colour. 



Rings. Not denned; boundary doubtful. 



Soft Tissue. Of no definite arrangement, but the whole of the 

 wood is soft and " coarse-celled." 



Eadial Section. Rather lighter in shade than the other sections. 

 The Pores are fine scratches. The Rays are inconspicuous, yellow- 

 ish flakes. The Rings are not indicated. 



Tangential Section as the Radial, but the Rays need the lens, 

 being minute and almost imperceptible on account of the lack of 

 contrast. Height about '2 m/m. 



Type Specimens. Authenticated by Bell, No. 32/2708. 



53. HEVEA. SP. (Probably). 

 Nat. Ord., EUPHORBIACE.E. Native Name, " KOOLABALLI " (2). 



Salient Features. "A coarse-grained wood of a dirty drab 

 -colour" (2). 



Physical Characters. Weight (so far recorded) 37 Ibs. per cubic 

 ft. Hardness, Grade 7, soft; compare Pine. It has rather curious 

 odour when sawn. Taste 0. Apparently a Sapwood tree. My 

 specimen from a tree 10 ins. in diameter is all Sapwood. Darkens 

 little, if at all, on exposure to the air. Surface lustrous. 



Bark. About J in. thick, smooth or warty; firm and woody 

 outside; fibrous and bristly within. Surface of log beneath Bark, 

 smooth or striated. 



Uses, Qualities, etc. " Common, but of little value " (2). 

 Specimen was unsound, hence the tests are of no use. The wood 

 is not suitable for export, and of little value in the Colony. 



Authorities. 2. Bell, p. 7. 12. Hawtayne, p. 387. 17. 

 Laslett, p. 452. 



ANATOMICAL CHARACTERS. 



Those of Eda-balli, No. 25, and Kurahara, No. 57, and No. 57 

 Frontispiece, with which latter this should be compared. It dis- 

 plays the following differences : 



Transverse Section. A trifle darker than the other sections. 



