94 The Timbers of British Guiana. 



ANATOMICAL CHARACTERS. 



As those of the preceding species, No. 9 la. 



Transverse Section : 



Pores. Just visible with the naked eye, rather small; little 

 variation except in the pairs which are few; evenly distributed; 

 Pore-rings rare; many with white contents; bleed but very little 

 in this section. 



Rays. Visible with the lens, very fine; uniform; regular; 

 about the width of a Pore apart. 



Rings. Well-defined ; boundary a fine line of Soft Tissue. 



Radial Section. Surface lustrous. The Pores are mere 

 scratches, the chambers of which are not visible without a lens. 

 The Rays are readily visible, semi-transparent flakes, but not 

 prominent, and in Tangential Section are scarcely 1 m/m. high. 



Type Specimen. Authenticated by Bell, No. 91/2747. There 

 are two kinds of leaves in the collection, one green and the other 

 copper-coloured . 



For convenience No. 9 la may be called the thick-barked Wal- 

 laba, and No. 91 the thin-barked Wallaba. McTurk (206), p. 180, 

 states that there are four varieties, of which Sarabebe, No. 77, 

 may be ignored, as it is quite unlike the two now in question. 

 A second is neither mentioned by name nor described, so there 

 remain Bimiti Wallaba and Itoori Wallaba. He refers all four 

 to Eperua falcata (E. Jenmani. Oliv.). In another place (206) 

 he says that Itoori W. is E. Jenmani. Oliv.; Bimiti W., a tree 

 with white flowers, is E. Schomburgkii, Bth., while Soft Wallaba 

 (which I suspect is our No. 91a) is E. falcata. Aubl. Unfor- 

 tunately we are not in the position to clear the matter up, as the 

 collector, Mr. D. G. A. Spence, in his letter of March 18th, 1907, 

 calls No. 91 " Bimiti Itoori," and appears to be unaware that two 

 kinds of wood were sent for this number. Martin-Lavigne's speci- 

 men is our No. 910. 



92. SWARTZIA TOMENTOSA, D.C. 



Nat. Ord., LEGUMINOS^:. 



Synonyms, ROBINIA PANACOCO. AUBL. B. TOMENTOSA. WILLD. 

 FRONTISPIECE, No. 92. 



Alternative Names. " Wamara " (2); Brown Ebony, Club- 

 wood " (9) ; " Pao de remo in Para, Ironwood in Cayenne " (21) ; 

 not the "Ironwood" described by Martin-Lavigne (20c), p. 153. 

 "Palo Santo" (18a) ; " Pferdefleisch holz " (28); " Naranjillo " 

 (21); " Bois de Fer, Anacoco " (1); "Saint Martin in Fr. 

 Guiana" (4a) ; " Hukuya, Anacoco Wanebala in Brazil " (7). 



Salient Features. A very hard, heavy, deep purplish wood. 



Physical Characters. Weight (so far recorded), 64^-66 Ibs. 

 per cubic ft. Hardness, Grade 2, extremely hard ; compare Box- 

 wood or Greenheart. Smell 0. Taste faintly astringent. 



