( 21:^ ) 



Sclerotiopsis p i 1 y op li i I ;i (('oi'fl.i) Ocd., a siipropliyto, jippoais 

 as black, flesliy graiiks (Fig. J), 7._^ •) mm. hmad, whicli are expelled 

 from the tiysue of the needles. Tiiey coiisisl of |)o|ygonal pareiiehvni- 

 cells which at the circiimfei-ence are larger, hardei- and (hirkor hul 

 in the interior become smaller, softer and colourless and seem to 

 border on a small cavity, which is soon filled with spores. These 

 latter are oval or egg-shaped, straight or slightly cnrved (Fig. 7), 

 unicellnlar and undivided and ha\e rounded tops. TJiCN' varv from 

 7 — 8X'^ — 4,u, have no polar drops and no appendices. Germi- 

 nating spores were not fonntl. 



The first Sclerotioji^/s was found by Spkgazzini in the Ar^'^entine 

 republic on rotting leaves of Eucahiptus Globulus and was called 

 S. austmhislac((. A second and third species {Scl. Cheirl Oud. and 

 Scl. Poteutlllae Oud.) uere found by myself and IMr. Heins, the 

 former on the stems of ClielrantJius Cheirl in the Botanic (iardenat 

 Amsterdam, the latter on the leaves of Potentilla procumhens at Nun- 

 speet. Finally Corda first mentions Scl. inti/ophila (C'oi-da) Oud. which 

 was collected in 1840 on jiine-needles at Prague and (JO vears later 

 at Nunspeet. 



FJc 



EXPLANATION OF THE FIGURES. 



1. A few needles of Pirms silrestris studded willi peiillieoia oï Sclerotiopsis 



intyopkila (Gonla) Oud. — Natural size, 



2. A needle of Scl. pityophUa loaded willi some perilliecia. Cross-Section, 



Magnification 100, 



3. 4 and 5. Vertical sections of Scl. intyopliila, magnified ^00 limes. The 



carbonaceous wall of the peiilheciiim is clearly visible here everywliere. 

 In 3 and 5 the perilliecia have broken through the epidermis, in 4 not 

 yet ; in tlie former two also the conglomerated spores are discerned. 



6, A piece of a peripheral part of the wall of the peritheciiim with some 



stalked spores, Magn, 1000. 



7. Single spores, 1000 times enlarged. 



