Neiej or Rare Microfungi. A. Lorrain Smith. 151 



Mycosphaerella Cydoniae Grove, in Journ. Bot, Ivi. p. 285 

 (pi. 550, fig. i), 1918. 

 On dead dry leaves of Cydonia vulgaris, on a heap of humus. 

 Hereford, May, etc., 1917 and 1918. The genus name Myco- 

 sphaerella has been substituted for that of Sphaerella as the latter 

 was originally that of a genus of green algae. Some authorities 

 have limited Mycosphaerella to species with many-spored asci. 

 Grove does not indicate the number of spores, presumably he 

 accepts the broader interpretation of the genus. 



Pleospora hydrophila Karst. in Hedwigia, xxii. p. 178, 1883. 



Perithecia scattered, innate, spheroid, smooth, black, 0-2 mm. 

 wide; ostiole papillate, emergent; asci oblong, subsessile, 

 Sojx X 22/Lt, 8-spored; spores tristichous, oblong-fusiform, 

 unequal-sided or slightly curved, 5-septate, slightly constricted 

 at the septa, the third cell protuberant and with a longitudinal 

 septum, yellow-brown, 22-30/u, x 6-io/x. 



On leaves oi Acorns calamus in Fennica; on stems of Alisma 

 plantago-aquatica , Kilwinning, Ayrshire : D. A. Boyd, Jan. 1914. 



In Mr. Boyd's plant the perithecia are larger (350/^), the ostiole 

 about 50)M across. The spores vary from monostichous to 

 tristichous ; coloration and size of asci and spores very similar. 



Sphaerulina Alni n. sp. 



Peritheciis laxe gregariis, nigris, sublentiformibus, ostiolatis, 

 immersis, ostiolis epidermidem perrumpentibus, ca. i mm. 

 diam. ; ascis aparaphysatis, dense confertis, baud vel vix 

 rosulatis, clavato-cylindraceis, rectis vel leniter curvatis, apice 

 rotundatis, ad basim in stipitem ca. 15 /t long, attenuatis; 

 sporidiis inaequaliter distichiis, oblongo-ellipsoideis, rectis, vel 

 interdum curvulis, 3-septatis, 22-30/^ x 8/x, hyalinis, guttulatis. 



In cortice suberoso emortui Alni : D. A. Boyd, West Kilbride, 

 Ayrshire, April 1918. 



BoYDiA gen. nov. 



Perithecia nigro-brunnea, submersa, globoso-lenticularia, 

 ostiolo breviter papillato pertusa. Ascis elongato-clavatis, 

 octosporis aparaphysatis; sporis elongatis, curvulis, utrinque 

 clavatis, medio sensim attenuatis, i-septatis, hyalinis. 



Evidently a member of the Sphaerellaceae, but unique in 

 the peculiar spores. 



B. REMULIFORMIS n. sp. Fig. I. 



Perithecia solitaria, numerosa, cortice subvelata, nigro- 

 brunnea; contextu tenuiter membranacea, ca. 400/x diam.; 

 ascis oblongis, ca. 155 fx long., 25 /a lat., apice rotundatis, basi 



