44 



thèse cells form the «mail black border, by which the red 

 spots are surrounded. Where the wood shows the black 

 or brown colour, thèse same masses occur within the 

 cells, hère also coloured from light to dark brown, in the 

 medullary rays and the woodparenchyma as well as In 

 the fibres and the ducts. This mass quite corresponds to 

 that found by Went in petrifled fruits'), not only in 

 shape but also in its behaviour towards chemical reagents, 

 so that with the same réservation it may be considered 

 as woundgum. Von Faber also mentions it, in his descrip- 

 tion of the cacaocanker ^) as well as in that of the witch- 

 brooms ^) in the Cameroons. 



Therefore the sécrétion of this woundgum is probably 

 not characteristic of a definite disease, but produced in res- 

 ponse to the stimulus resulting from a variety of diseases. 



The discolouration does not always spread. Often a 

 new healthy tissue forms under the diseased area, in 

 which case the red bark is loosened from its surroundings, 

 dries up, becomes dull brown and may easily be removed. 

 Howard noticed this in Grenada ''), but only in rare ca- 

 ses and when the wood had not yet been afi'ected. Carru- 

 t h e r s '*) often saw the moist claretcoloured tissue dry up, 

 after which it had quite the appearance of dead wood. In 

 his second report *) he says that after having been su- 

 perflcially shaved and exposed to the air, the diseased 

 tissue dries up and „in some cases scales out and drops 



1) F. A. F, C. W e n t. KruUoten en Versteende Vruchtcn van 

 de Cacao in Suriname. Verliandelingen der Koninkl. Akademie van 

 Wetenschappen te Amsterdam. Tweede Sectie. Deel X. No. 3. 1904, p. 31. 



2) See V. F a b e r. p. 398. 



3) See V. F a b e r. p. 393. 



4) See H w a r d. p. 200. 



5) See C a r r u t h e r s 1898. 



6) See C a r r u t h e r s 1899, p. 359. 



