NEW OR NOTEWORTHY FUNGI 45 



diaphanous epispore, for which reason it is quite inconspicuous 

 and cannot be seen except by microscopical examination. 



168. Heterosporium gracile Sacc. Syll. Fung. iv. 480. 

 Hyphae in little clusters which are often slightly circinating or 



scattered over oblong or elliptical dry patches of the leaf ; spots 

 pale, surrounded by a distinct fuscous-purple border. Hyphge 

 erect, rather flexuose, septate, nodulose upwards, olive, 40-150 x 

 9-10 /x, having at the base a little knot of a few dark cells. 

 Conidia oblong, 1-3- (or even 4-) septate, constricted at the septa, 

 30-45 X 16-18 />t ; cells cubical or rounded, at first pale and 

 smooth, then dark olive and distinctly muriculate. (Tab. 516, 

 fig. 6.) 



On leaves of Iris germanica, Studley Castle, October. 



169. Speira coh^rens Preuss, Sacc. Syll. Fung. iv. 515. 

 Conidia erect, collected into little clusters which are thickly 



scattered or even arranged in lines, olivaceous-green in mass, 

 singly pellucid olive, 25-40 x 20 /x, oblong-obovate, not always 

 plane but often consisting of two layers in the centre, composed 

 of 4-6 series of joints. Joints subquadrate, translucent, 4-5 ft 

 diam., many with a large oily nucleus. 



On bark, Maxstoke Priory (Wk.), August. This seems to be 

 the species of Preuss, but I would rather consider it a translucent 

 variety of S. tondoides, possibly a young state. 



170. Speira effusa (Peck) Sacc. Syll. Fung. iv. 514. 

 Conidia 20-30 /x wide, effused in a blackish brown velvety 



stratum, resembling those of Speria toruloides, but the separate 

 joints are only 5-6 fi wide. 



On dead wood, Studley Castle, March. This also I consider 

 to be a mere variety of S. toruloides Corda. They should be 

 arranged thus : — 



S. toruloides Corda. 

 var. effusa Peck, 

 var. translucens m. = S. cohcerens Preuss. 



The breadth of the joints of S. toruloides given by Saccardo 

 (1. c. p. 514), viz. 8-9 [X, is certainly greater than the usual state. 



171. Septosporium elatius m. Effusum, atrum, velutinum ; 

 hyphis biformibus, sterilibus filiformibus, brunneo-atris, opacis, 

 flexuosis, basi subincrassatis, superne interdum subpellucidis, 

 multiseptatis, ad septa vix constrictis, 500-1000 x 18-20 /x ; fer- 

 tilibus (h. e. conidiorum pedicellis) brevibus, olivaceis, 6-8 /x cr., 

 pellucidis, 4-5-septatis, apice in conidia clavata abeuntibus ; 

 conidiis 20-25 /x lat., olivaceis, vix obscurioribus, 2-5-septatis, cum 

 pedicello 80-130 /x long., subinde curvatis, septo longitudinali 

 rarissimo. (Tab. 516, fig. 7.) 



In cortice, Aberystwyth, Jan. Macrosporium nigrelluin C. et E. 

 peraffine videtur, conidiorum insertione neglecta. 



172. Alternaria tenuis Nees, Sacc. Syll. Fung. iv. 545 ; 

 Fung. Ital. t. 737. 



Forming a very thin layer ; hyphae very short, erect, septate, 

 pale in colour ; conidia in branched chains, lageniform, olivaceous, 



