54 



thought it highly probable, that both conidial forms and 

 the ascus form belonged together, he regarded it as uncer- 

 tain, until he should havc proved it by further inves- 

 tigations, which were in progress, when his article was 

 published. Apparently he has not completed his research as 

 Stockdale ') observed recently, that an exact knowledge 

 of the lifehistory of N. Theobromae and Cal flavida was 

 not yet complète and investigations would be continued, 



The Nectria noted by H art on cankerspots of cacao 

 trees appeared also to he Nectria Theobromae ''). VonFaber 

 also found a Nectria on bark from cankertrees in the 

 Cameroons. To jadge from his figures and description =^) 

 this form is différent from xY. Theobromae and certainly 

 distinct from the one observed as a saprophyte in Suriname. 

 V. Faber hadno opportunity of makinginfectionexperiments 

 and could only study fixed material, so that he could 

 not cultivate the fungus. Therefore it is a mère supposition, 

 that this Nectria is parasitic on cacao. 



From the foregoing it is évident, that although several 

 forms of Nectria hâve been considered to be the higher 

 fructification of the cankerfungus, none has been definitely 

 proved to be so by experiments to vphich no objection 

 can be taken. The confusion on this point is the greater 

 for want of accurate descriptions of thèse différent forms. 

 They hâve only been given for Nectria Theobromae and 

 the Nectria found by von Faber in the Cameroons. 



We must put another important question which has 

 not yet been solved: What is the cause of the pod-disease? 



With conidia, ascospores or pièces of cankered bark, 

 Carruthers could produce the disease in pods. It also 

 spread to the pod from a diseased spot in the bark, and 



1) Stockdale. West-Indian UuUetin. Vol. IX, 1908, p. 172. 



2) Stockdale. West-Indian Bulletin. Vol. IX, 1908, p. 170. 



3) Ses V. F a b e r. p. 400. 



