402 ME. M. C. COOKE OX THE 



Mysore fungus was investigated. The first communication was 

 from Venezuela*, which stated that the coffee-disease there known 

 was called "Candelillo " or "Mancha de hierro" (iron stain); and 

 specimens of the leaves were sent for examination with the 

 following note, drawn up by Senor Saenz, Professor of Botany in 

 the University of Bogota. The disease, he says, " consists of cir- 

 cular or elliptical blotches of an t)chreish-yellow colour, in which 

 are to be observed hard knots in the centre, round which are 

 formed concentric bands. The salient knots are to be easily dis- 

 tinguished on each side of the leaf; but on the one side only are 

 to be found small fungi of a yellow colour (orange), formed of a very 

 delicate pedicle crowned by a small sheaf of fibres, in which are 

 an abundance of oval corpuscles of a darker colour, approaching 

 to green, and of -003 millim. in diameter." 



The specimens which accompanied this note were submitted 

 to the Eev. M. J. Berkeley, who reported that the spots were 

 occupied by a minute fungus which he called Depazea maculosa, 

 Berk., having fusiform spores -0008 inch long (or -02 millim.) with 

 about seven nuclei. 



It may be remarked here that the old genus Depazea of Fries 

 was characterized chiefly by the presence of small perithecia 

 seated on discoloured spots, the structure of the perithecia and 

 their contents not being taken into account. Hence some of the 

 species of Depazea had perithecia which contained only stylo- 

 spores, others asci with sporidia. -When microscopic fungi had 

 to be revised, as a consequence of improvement in the microscope, 

 the genus Depazea was divided into two parts : those containing 

 stylospores in the perithecia were denominated Septoria, and 

 those in which the perithecia contained asci were relegated to 

 Spharella, and the old name of Depazea became practically obso- 

 lete. The species above noted as Depazea maculosa would there- 

 fore now be denominated Septoria maculosa. Experience has de- 

 monstrated that in some cases the Septoria is only an imperfect 

 condition of an ascigerous Sphcerella, which makes its appearance 

 on the same or upon contiguous spots on the same leaves. The 

 relevancy of these observations will be apparent hereafter 



Subsequently, further specimens were sent to Kew Gardensf 

 from Dr. Ernst of Caracas, which demonstrated that the names 

 of Candelillo " and "Mancha de hierro" were not applicable to 

 * Kew Gardens Report for 1876, p. 21. 

 t Kew Gardens Report for 1877, p. 28. 



