DEMATIUM PULLULANS. 379 



from a rotten egg ; and the same is reported of Malrosporium 

 verruculosum by 0. E. R. Zimmermann, The latter worker also 

 observed Torula ovicola, Penic'dlium glaucum, Stysanus otemonitis, 

 and its parasites, Echinoboiryum atrum, 

 and species of ftporotrichum. Finally, 

 Hormodendron dados porioides was fre- 

 quently observed by ZOPF (X.) in such 

 eggs. According to the infection ex- 

 periments carried out by Drutzu, conidia 

 of the said fungus that have been acci- 

 dentally or designedly placed on the 

 unbroken shell of the egg germinate, 

 penetrate the shell and internal mem- 

 brane, and develop between the latter 



1,1 11. i j.i i FIG. 187. Mycospmerella 



and the yolk to an agglomerated, gela- Tuiasnei (E. Jancz.). 



tinous, dark brown mycelium, which Conidia from the mycelial fila- 

 gradually consumes the albumen ; so ment shown in Fig-. 185, two 

 that in certain cases none of this latter , ' 

 is leit, the yolk being enveloped in a w ith two. Magn. 650. (After 

 thick coat of fungus. On air gaining Jnnczewski.) 

 admission, in consequence of the gradual 



contraction and drying up of the contents of the egg, conidia are 

 formed. Further particulars of the decomposition of eggs by 

 Cladosporium herbarum have been furnished by CERLESE (III.) and 

 GUEGUEN (TV.). A reliable means of preventing this incursion 

 of aerobic Eumycetes is afforded by varnishing or liming the eggs 

 while fresh. 



According to a report by F. RATHGEN (I.), a fungus was dis- 

 covered in patina (see p. 372, vol. ii.) by L. Morid and G. Guboni, 

 and was named by them Cladosporium, ceris. From comparative 

 experiments they were obliged to conclude that this fungus 

 contributes to the destruction of bronze. 



297. Dematium Pullulans. 



On p. 375, vol. ii., it was stated that the genus Sphcerulina, 

 belonging to the family MycosphcerellacecK (a sub-order of the 

 Sphceriacece) , is distinguishable from the allied genus Mycosphcerella 

 by its multicellular ascospores. Of that genus only a single species, 

 Sphcerulina intermixta, is of interest to the fermentation physio- 

 logist. The small perithecia of this fungus are found on withered 

 rose-twigs; and one of the asci~from the ascospores of this is 

 shown, with its eight multicellular spores, in Fig. 188. When 

 ripe, the asci are forced out of the perithecium, the ascospores 

 being then liberated in consequence of the swelling up of the 

 wall of the ascus. On finding themselves on a suitable substratum, 

 they swell up immediately, develop longitudinal and transverse 

 septa in their several cells, and also produce daughter cells by 



