201 
stromata (see fig. b), or in extreme cases the stromata may even 
coalesce entire ely. 
Under the hitherto generally accepted nomenclature of Sac- 
cardo’s Sylloge the fungus would have been placed in the genus 
Bagnisiella, Spe é: .» which was Poicataag Sexeg at from Phyllachora 
shown, howev ver, hat the ype of the genus Bagnisiella, B. 
australis, Speg., differs from true Dothideales in having, in place 
of true loculi, a ‘‘ kontinuierliche Fruchtschicht,”’ thus suggest- 
ing relationship with the Discomycetes. They therefore confine 
Bagnisiella to this species, excluding it from the Dothideales, 
and constitute two new gen , Bagnisiopsis (with paraphyses) 
and Amerodothis (without eat yes), for the true Dothideales 
with hyaline continuous spores and erumpent stromata which 
were previously referred to Bagnisiella. The fungus described 
below possesses paraphyses, and appears to be a new species 0 
Bagnisiopsis. 
Bagnisiopsis Dioscoreae, Wakefield. 
Stromata erumpentia, sublineare-elongata, pulvinata, super- 
ficie ob loculos = rugosa, atra, m. diametro, contextu 
pseudoparenchymatic oculi numerosi, globosi, ad 500 p dia- 
metro. Asc ewlindsii = rotundati, brevissime stipitati, 
octospori, 120-135 x 12-15 Paraphyses filiformes, 2-5-3 p 
diam etro, ascos. aequa nte 28. Sporae aaa Ee a 
Rises Southern Provinces: Okigwi district; on stem 
and panel of Dioscorea prehensilis, Benth., ba oS Factharion: 
Nov. i 
The same fungus has also been found on ene ager of 
dD. prehensilis, collected by Mr. and Mrs. P. A. Talbot at Oban, 
South Nigeria, in 1911 (Talbot, 26 in Herb. Kew oY 
ExpLanation oF Ficures. 
Portion of Dioscorea ene showing hypertrophied lateral 
a 
shoot with stromata of Bagnisiopsis Dioscoreae (nat. 
size). 
b steno section of stem from hypertrophied shoot, 
showing three stromata of Bagnisiopsis arising from 
the central vascular eae t oa the dotted regions between 
the stromata represent cortex (xabout 12, diagram- 
matic). 
c. Ascus of B. Dioscoreae (* 550). 
d. Spores (x 550). 
* Sa F., and Sydow, H. Die Dothideales, in Ann. Myc. xiii. 1915, 
pp. 651-6 
