288 THE JOURNAL OF BOTANY 



by a pore ; texture smoky-yellow. Spores ellipsoid, rounded at l)oth 

 ends, biguttulate, 7-8 x 2-3 fi. 



On living leaves of Corylus Avellana. West Kilbride, Ayrshire 

 (D. A. Boyd). July. 



Accompanied on the same spots by Lahrella Goryli Sacc, of 

 which it seems to be an early stage, for all possible sizes and shapes 

 of spores could be found between those of the Phyllosticta and the 

 typical spores of the Labrella. 



259. PnTLLOSTiCTA Eric^ Allesch. in Syd. Beitr. zur Kennt. 

 Pilzfl. Brand. Hedwig. xxxvi. p. (178). 



Pycnidia scattered, few on each leaf, ejnphyllous, covered by the 

 epidermis, then erumpent and subsuperficial, globose-depressed, black, 

 100-150 /i diam. ; texture variable, sometimes -Phi/llosficfa-Vike, 

 sometimes thicker and darker. Spores oblong or shortly cylindrical, 

 rounded at both ends, often biguttulate, 4-5 x 1^-2 yu, when older 

 eguttulate, 7-10 x 2-2.4 fi. 



On dead leaves of .Erica Tetralix. West Kilbride, Ayrshire 

 (Boyd). Jan. 



The dead leaves are reddish-bi'own. Sydow considered this fungus 

 to be a dangerous parasite on E. cornea in a nursery in Berlin, 

 gradually discolouring and killing the leaves. Mr. Boyd's specimens 

 differ in having the pycnidia entirely epiphyllous, not mostly hypo- 

 phyllous as Sydow describes them ; the spores also are slightly 

 different. 



260. Phyilosticta lychnidina, sp. n. 



Maculis amplis, marginalibus, 10-25 mm. diam., ochraceo-fuli- 

 gineis, denique centro pallidioribus, vix marginatis. Pycnidiis amphi- 

 genis, copiosis, sparsis, rotundis, lenticularibus, innatis, nigrescentibus, 

 100-120 u diam., epidermidem poro nonnihil transigentibus ; con- 

 textu pallide f usco, circa porum obscuriore. Sporulis oblongis, utrinque 

 rotundatis, 4-5 x 2 /x. 



Hab. in foliis vivis Lijchnidis dloicce. West Kilbride, Ayrshire 

 (Boyd), Jul. 



The texture of the pycnidium is that of a true Plu/Uosticta, but 

 the fungus is evidently not a more developed state of JJepazea Li/ch- 

 nidis Fr., thougli it might be an early stage of Ascochyfa Lychnidis 

 Lasch, of which nothing is known. 



261. Phtllosticta Platanotdis Sacc. Syll. iii. 13. 



Spots none or indistinct. Pycnidia hypophyllous, densely gre- 

 garious, collected here and there into groups, immersed, blackish, 

 globose, 60-100 /A diam., pierced by a pore; textm-e thin and trans- 

 parent, paL -brown. Spores rod-like, straight, C3'lindrical, 4-6 X |-1 //, 

 rounded at each end, where there is usually an indistinct guttule, and 

 for that reason appearing subconstricted in the middle. 



On fading cotyledons of Acer Pseudojyiafaitus. West Kilbride, 

 Ayrshire (Boyd). June. Accompanied by PA/fo«/)orfl'^c<?r/s Sacc, 

 the two often occvu-i-ing on the same spot. The spots, which are 

 roundish and about 4-5 mm. broad, seem then to be those made by 



