xv.] MOULD-FUNGI. 203 



salmon disease, as Professor Huxley has shown, 1 is caused 

 by this parasite. The zoospores of this salmon saprolegnia 

 are, however, as Huxley has shown, as a rule non-motile. 

 The hyphae of the fungus traverse the epidermis in the 

 diseased patches of the salmon, and they bore through the 

 superficial layer of the derma, a stem-part being situated in 

 the epidermis, and a root-part in the derma ; each of these 

 elongates and branches out. " The free ends of the stem- 

 hyphae rise above the surface of the epidermis and become 

 converted into zoosporangia, more or fewer of the spores of 

 which attach themselves to the surrounding epidermis and 

 repeat the process of penetration." In saprolegnia associated 

 with the salmon-disease Professor Huxley observed only the 

 asexual mode of fructification. 



An important case of general " mycosis mucorina " in 

 man, ending in death, has been recently described by Dr. 

 Paltauf (Virchow's Archiv, vol. 102, 3, p. 543). From the 

 alimentary canal of the patient an invasion of the internal 

 organs by the mycelium and spores of a kind of mucor 

 occurred, leading to the formation of metastatic inflam- 

 matory foci in the Peyer's glands, lungs, pharynx, larynx, 

 cerebrum, and cerebellum. In all these organs were found 

 smaller and larger foci of inflammation caused by the 

 presence of non-septate, branched mycelial threads and of 

 sporangia, showing that the fungus belonged to the group of 

 mucor. 



1 Proceedings of the Royal Society, No. 219, 1882. 



