316 THE COFFEE-LEAF DISEASE. 



of the papillate bodies had lost their contents, and remained as 

 empty colourless cases ; the further history of the contents has not 



been yet ascertained. 



On February 22nd, during an observation on the moist papillate 

 bodies, several of them were found to have emitted tubular processes 

 from one to four points of the circumference : these tubes are 

 continuations of the inner coat, and the coloured contents pass 

 into them. Further observations have shown that one tube usually 

 grows to a great length, its cavity is continuous, and no partitions 

 form across it ; it takes a curved and even coiled course, and sends 

 out many short branches at frequent intervals ; the diameter of 

 the tube is about one-fifth the breadth of the papillate body. A 

 streaming of the contents is often seen, and the coloured matter 

 passes gradually into the ends of the branches. From the above 

 facts it is inferred that the papillate bodies are spores, which in 

 certain circumstances germinate and produce a tubular mycelium ; 

 further facts are mentioned hereafter. 



The minute black dots on the dark parts of old patches are 

 found to contain multitudes of very small hyaline spores, budded 

 off from the ends of delicate filaments which are matted together 

 into a hollow case beneath the epidermis : the cavity becomes filled 

 with the spores. These facts are here mentioned because the black 

 points are so universal ; they are not yet known to have anything 

 in common with the above phenomena beyond what has been now 

 stated. 



On March 22nd, the peculiar appearance presented by certain 

 patches of "rust" obtained from " Inverness " estate, was shown 

 to be due to a different kind of body from the papillate spores. 

 The "rust" spots appeared pink rather than orange -coloured, and 

 were of a pasty rather than powdery character. Among the 

 clusters of papillate spores, their microscope showed certain bodies 

 of little more than half the size, quite smooth, crowded with red 

 granular matter, and of a shape somewhat like a turnip or peg-top ; 

 each was on a narrow stalk, and many had a central boss on the 

 top. These are not to be confounded with immature papillate 

 spores. 



Associated with the same external features, I have since 

 rediscovered these bodies at various places and times, e.g., Maturata 

 (March 25th), Ambagamuwa (April 5th), Peradeniya (May and 

 June), and extended observations have elicited the following 

 information : — ■ 



From the top, opposite the stalked end, a stiff tubular prolongation 

 of the turnip-shaped body is sent up ; the coloured contents pass in, 

 and when it has reached a length equal to six or eight times that 

 of the original body four partitions have cut the tube into as many 

 chambers. From each chamber a delicate lateral branch is sent 

 forth, which at once buds off a small globule at its tip ; this 

 globule receives the coloured contents, falls off, and persists, while 

 the rest dies. Here, again, I think we are justified in concluding 

 that the turnip-shaped body is a spore ; that on germination it 

 produce a short tubular, septate mycelium, whence small spores 



