22 ILLINOIS BIOLOGICAL MOXOGRAPIIS [188 



species, in the arrangement of the stromata and shape and size of spores; 

 from P. vinosa Speg. from Brazil, in shape and size of spores; from P. 

 ficicola All. and Henn. also Brazilian, in stroma characters and in spore 

 shape and size; from P. aspideoides Sacc. and Berl. from Brazil, in stroma 

 and spore size and shape; from P. amanicnsis P. Henn. in spore size and 

 shape; from P. devriesei Koord in stroma and spore size and shape. 



The stromata are scattered over the leaf but are more common near 

 veins though not on veins. The stromatic development is large resulting 

 in much thickening in the occupied part such that a leaf normally 230^ thick 

 is often 700^. (Figure 47) The clypeus covering the loculi is often 80j» 

 thick. 



The conidial stage falls in the Sphaerioidaceae-Scolecosporae. Spores 

 borne in the stromatic locules, and apparently singly on the conidiophores 

 would bring it close to Septosporiella. However, spores of Septosporiella 

 are colored. 



The following six Phyllachoras are given by number only, with de- 

 scriptions, because the host is unknown. It is quite probable that all are 

 new species but in the absence of knowledge as to the identity of the host 

 it is thought best to publish them thus without names. 



2.?. Phyllachora No. 1. 

 [Figure 51.] 

 Spot 3 to 8 mm. in diameter, yellow. Stromata 1 to 2 mm. in diameter, 

 black from both leaf surfaces, surrounded by a pale zone about 3mm. wide, 

 with a clypeus above and below. Locules 90 to 320^ wide, 90 to 180/i deep, 

 ostiolate, uniseriate, Asci 8-spored, 90 x 7 to 9/i. Paraphyses filiform, 

 hyaline. Spores hyaline, continuous, 11 x Ifi, oblong, obtuse. 

 On unknown host. 



British Guiana: Tumatumari, July 10, 1922, 149: July 9, 1922, 41. 

 The host is possibly Anonaceous, if so the species is new. 



24. Phyllachora No. 2. 

 [Figures 52 to 54, 100, 102.] 

 Stromata epiphyllous, very numerous, punctiform, black, about 1mm. 

 in diameter, uniloculate, rarely biloculate, scattered evenly over large 

 areas, in the epidermis and palisade region and extending about half 

 way into the mesophyll. Clypeus epiphyllous. Locules 185 to 380^ wide, 

 ostiolate. Paraphyses filamentous, gelatinous, crooked. Asci 8-spored, 

 88 X 11 to Hn, spores inordinate. Spores continuous, hyaline, oblong, 

 obtuse, 7 to 9 X 12 to 18ju. Pycnidial cavities similar to the perithecial; 

 conidia filiform on linear conidiophores. 

 On unknown host. 

 British Guiana: Tumatumari, July 9, 1922, 89. 



