182 



faintly 1-septate, granular, 20-22 x 2-5-3 /x 9 on spirophores 

 which are truly fasciculate, linear or tapering slightly up- 

 wards, 20-25 x 1 fi. (Fig. 4). 



t 





t • 



• I 



P. Padina 



4 



a, A-spores; 6, B-spores; c, C -spores; 

 all from Eoura. no. 493. 









The A-spores are those of Phornopsis padina, Died. ; the B- 

 spores are like those found in manv species of that genus, but 

 neither of these is what Allescher described. He seems to have 

 met with only the C-spores, but according to Roumeguere's speci- 

 men these belong, not to a Septomyxa, but to a Fusicoccum. 

 They are in shape like those of Cryptomela atra (Kunz.) Sacc, 

 as figured by Corda (Sturm, Peutsch. Crypt. Fl. tab. 49), but 

 singly are all but colourless, though faintly pinkish-brown in 

 mass. Although all three kinds of spores were not seen in the 

 same pycnidium, yet A and B spores were found together, and 

 also B and C spores together, so that they all presumably belong 

 to the same fungus, which is Diaporthe (Chorostate) decorticans, 

 Sacc. & Roum., of which Phornopsis padina, Died, is considered 

 the pycnidial stage. 



It should be noticed that Allescher found what he calls Myxo- 

 sporium padinum in company with the Septomyxa, of which 

 it is evidently a mere early state, although he unwisely repudiates 

 any suggestion that they are genetically connected. Possibly 

 the Fusicoccum, state is merely a variant of the Septomyxa, 

 because it is well-known that a Phomopsis may be found both 

 with and without a distinct pycnidium, according to its age. 



This case is no doubt similar to tliat of Diaporthe lonqirostis, 

 Sacc, which is also a Chorostate, and to which von Hohnel and 

 others assign as pycnidial forms the following 



Phomopsis Tulasnei, v. Holm. 

 Septomyxa Nequndinis, Allesch. 



species 



J9 



Tulasnei, v. 



Hoh 



n. 



Myxosporium Spathianum, Allesch. 



,, Tulasnei, Sacc, with its 



Allesch., all of which occur on branches, 

 safely be added : 



Gloeosporium acerinuin, "Wt-std. 



Marssonia acerina, Bres. 



variety 



and to 



inonacense, 

 which may 





as a leaf-form, differing from the branch-forms merely in being 

 of a less complex construction. 









