New or Rare Microfungi. A. Lorrain Smith. 155 



Cytospora Myrtilli Grove in torn. cit. p. 294, 1918. 



On dead branches of Vacciiiiiim Myrtillus, West Kilbride, 

 Ayrshire (D. A. Boyd), March 1918. 



Camarospormm Stcphensii B. & Br. 



Further specimens of this fungus have been collected by 

 D. A. Boyd at Ardrossan, Ayrshire. The stems of the bracken 

 on which the fungus grows bear a number of elongate swellings 

 splitting above, the interior of which arc occupied by a line of 

 pycnidia of somewliat irregular form about 225 /x x 150/* and 

 with thin brown walls. The large muriform spores are borne 

 on short sporophores as already described in Trans. B. M. S. 

 vi. p. 50, igi8. 



NECTRIOIDEAE. 



Zythia Mercurialis Kickx Fl. Crypt. Fiand. i. p. 449, 1867. 



Pycnidia scattered or congregate, dull yellow then rust- 

 coloured at length brownish-black, almost globose, with a pore 

 at the apex; spores elongate or ovate, very small. 



On leaves, petioles and stalks of Mercurialis per cunts, 

 Garforth, Yorkshire. No measurements have been recorded 

 but there is no reason to consider the specimens collected as 

 different from the above; the minute yellow pycnidia measure 

 from 100-125 /x, the ostiole 25 /x in diam. The spores are mostly 

 small, varying from ovoid to ellipsoid, usually about 5 /u, x 2-2-5 /x '> 

 mixed with these are a few spores almost double in length, and 

 occasionally constricted and septate, iojlx x 3/^. 



LEPTOSTROMATACEAE. 



Leptothyrium Fragariae n. sp. 



Maculis testaceo-brunneis, parvis vel latis, non limitatis. 

 Pycnidiis epiphyllis, numerosis, sparsis vel grcgariis, punctifor- 

 mibus, convexo-dimidiatis, atris, nitidis, minutis, ad 120/x latis; 

 contextu fuliginoso radian te; centro irregulariter pertuso; sporis 

 cylindraceis, rectis, continuis, hyalinis, 3-6/x long, 1-1-5 /x lat. 



In foliis langusecentibus Fragariae vescae: D. A. Boyd, 

 Largs, Ayrshire, Feb. 1918. The pycnidia cover large areas 

 of the leaf. Gnomonia Rosac was also present along the veins 

 on the under surface. 



MELANCONIEAE. 



Melanconium zonatum Ellis & Ever, in Peck, 44th Rep. N. 



York State Mus. p. 136, 1890; W. B. Grove in Kew 



Bull. 1918, p. 164, fig. 3. 

 Considered by Grove to be British. It has turned up on 

 birch at Byram Park, Selby; the spores agree in size and form 

 with Grove's measurements and drawing. 



