CEYLON FUNGI. 89 



obliquis ' ne sont certainement autre chose que les soies 

 conidiferes, qui out cette form dans un certain nombre 

 d'especes." 



On looking up the Ceylon specimen of Meliola zigzag in 

 Herb. Kew, it is at once seen that the greater part of the 

 fungus on the leaves is Cladosporium congestum. There is, 

 in addition, a fungus which forms very thin, cloudy, black 

 patches. The latter patches consist of repent, interlacing 

 hyphse, 3-4 [j. diameter, sometimes united into^ strands ; the 

 hyphse are fairly regular, are destitute of hyphopodia, and 

 bear a few scattered, erect, simple, conidiophorcs, up to 70 [j. 

 high. These cloudy i)atches are much larger than the Clado- 

 sporium patches, and can Scarcely be an immature state of the 

 latter. The leaves also bear black, compact patches, up to 

 1 mm. in diameter, consisting of a basal laj'er of interwoven, 

 thin, black hyphse ; in this layer occur immature perithecia, 

 crowded together and ultimately completely covering it. 

 These appear to be immature Dothidea orbis (Berk.). Whether 

 either of these is what Berkeley and Broome attributed to 

 Meliola zigzag is uncertain, but there is apparently nothing 

 which approaches Gaillard's description of the Cuban fvmgus. 



The description of Meliola zigzag was published in 1869, at 

 a time when Berkeley already had in his possession the bulk 

 of the Thwaites's collection of Ceylon fungi. In view Of 

 Gaillard's note, it would seem po.ssible that the description of 

 Meliola zigzag includes details from^the Ceylon specimens of 

 Oladosjiorium congestum. 



Cladosporium congestum forms lax, blackish-brown tufts of 

 hyphae, up to 1 mm. diameter, or larger by confluence. The 

 whole tuft is superficial, and separates from the leaf like the 

 mycelium of a Meliola. The hyx^hse are blackish-brown, 

 sub-erect, regular, about 4 [j. diameter, septate, flexuose above, 

 up to 1 mm. long. At the base of the tufts are compact, 

 nodular masses of mycehum, from which some of the erect 

 hyphae arise. Perithecia were not found. The smaller conidia 

 are blackish-brown, cyhndric, often curved, two to three 

 septate, 24-33 X 4-6 [i. ; the larger are clavate, curved or 

 sigmoid or straight, strongly attenuated, and almost hyaline 

 below, four to six septate, 44-60 x 6-8 ^.. 



