PHACIDIUM. 57 



splitting above into 35 teeth ; stylospores straight, con- 

 tinuous, colourless, 1213 x 3 p.. 



Ceuthospora phacidioides, Grev., Scot. Crypt. FL, pi. 253. 



Cryptospliaeria bifrons, Grev., Flor. Edinb., p. 361. 



Sphaeria bifrons, Sow., Engl. Fung., t. 316. 



On the upper surface of dead holly leaves. 



Phacidium vaccinii. Fries, Syst. Myc., ii. p. 575 ; 

 Phil., Brit. Disc., p. 389 ; Sacc., Syll., n. 2902. 



Scattered ; erumpent, about ^ mm. across, convex, black, 

 shining, rugulose, splitting from the centre into usually four 

 teeth, disc sooty black ; asci broadly clavate ; spores 8, irre- 

 gularly biseriate, elliptic-fusiform, straight, continuous, hya- 

 line, 10 x 2 -5-3 '5 //,; paraphyses filiform, about 1*5 //, 

 thick. 



Xyloma erumpens, Fries, Obs., i. p. 202. 



Spermogonia. Spermatia cylindrical, ends truncate, straight, 

 continuous, colourless, 10-13 x 2-2 5 /A, produced in minute, 

 blackish conceptacles. 



Dothidea latitans, Fries, Syst. Myc., ii. p. 552. 



Phyllachora Jatitans, Sacc., Syll., iii. p. 60. 



Dothiorella latitans, Sacc., Syll., iii. p. 241. 



Dothiopsis latitans, Karst., Hedw., 1884, p. 20. 



On leaves of Vaccinium vitis Idaea. 



Phacidium abietinum. Kze. & Schmitt, Mycol., Heft 

 1, p. 35 ; Phil., Brit. Di b c., p. 392 ; Sacc., Syll., n. 2925. 



Gregarious, erumpent, blackish-grey, more or less orbicular, 

 convex then depressed, ^-1^ mm. across, splitting above into 

 3-4 blunt teeth ; disc grey"; asci clavate, apex rather trun- 

 cate ; spores 8, irregularly biseriate, elliptic-fusiform, straight, 

 hyaline, continuous, 9-13 x 3 '5-4 -5 p.; paraphyses cylin- 

 drical, about 2 5 /A thick, colourless. 



On the under-side of fallen pine leaves. 



Allied to P. infestans, from which the present is distin- 

 guished more especially by its much smaller spores. 



Phacidium infestans. Karsten, Symb, Myc. Fenn., 

 xix. p. 87; Sacc., Syll., n. 2924. (fig. 21, p. 12.) 



Subgregarious, more or less circular in outline, 1 mm. 

 across, at first covered by the epidermis, blackish, splitting 

 from the centre into irregular teeth ; disc pale ; asci broadly 



