BY D. Mc ALPINE. 479 



gradually tapering towards mouth, or swollen just below the 

 opening. It may also be of a bright leek-green or greenish-brown 

 or dark brown. The hairs fringing the mouth are simply tapering 

 continuations of the cells of the walls, which are hyaline instead 

 of being coloured. The pycnidia are sometimes very long, attain- 

 ing a length of 670 fi. 



The pycnospores are olive- green, pale yellowish-brown or 

 yellowish. They are also colourless, but probably they pass from 

 colourless to green, then to brown on maturity, like the sporidia. 

 They are ovate to oval, or even cylindrical, generally 3- (sometimes 

 2- or 4-) septate, slightly constricted at the septa, and sometimes 

 longitudinally divided, 15-22|^ x 5|-9^- /n, average about 19-20 x 

 7^ fi. As already noticed, one branch may produce spermatia 

 and the other pycnospores. I have observed no connection 

 between spermogonia and pycnidia in their contents, but between 

 the spermatia and the spores of cerato-pycnidia there is a close 

 agreement. 



(8) Perithecia. — They occur in large numbei's at various stages 

 of development, but none were found naturally ojDcned. They 

 are upright and deeply imbedded in the coloured hyphfe, so that 

 their black-looking, rounded, upper portion is only distinctly 

 seen. When crushed, the thick tough wall, as seen by trans- 

 mitted light, is regularly of a characteristic sea-green or sage- 

 green colour, and with a decided net-like surface. 



They are oblong to oval or variously shaped, smooth in the 

 upper portion, but often with adhering hypha? in the imbedded 

 portion, and varying in size from 112-250 x 52-112 /x. 



The asci are hyaline, cylindrical-clavate in shape, sub-sessile, 

 with rounded apex, 8- 6- 4-spored, and ranging from 49-81 x 15-20yii. 

 The fully mature asci average 70-80 x 19-20 fx. 



The sporidia when mature are brown, oblong, sometimes a 

 little fusoid, generally obtuse at both ends, constricted about the 

 middle, 5-6-septate, often with longitudinal or oblique septa, 

 arranged mostly in two ranks, but occasionally in three, and 

 averaging 21-24 x 8-^-9^ /^i. 



