228 APPENDIX. 



sporangia, yellowish to pale-brown ; spores round. By 

 continued cultivation in liquids saturated with carbonic 

 acid, the hypha becomes shorter, and exhibits a yeast-like 

 sprouting. These yeast-like or toruloid cells can, when 

 the carbonic acid is withdrawn, germinate into normal 

 mycelium. 



Mucor Stolonifer, Lichtheim. Mycelium grows 

 in the air, and then bends down and re-enters the nutrient 

 substratum ; sporangia black, and spores globular. The 

 mycelium can penetrate through the shell of eggs, and 

 form conidiophores within them. 



Mucor aspergillus, Lichtheim. Fruit hyphae, 

 thinned at the base, and with many fork-like divisions, 

 dark-brown spores. 



Mucor phycomyces, Lichtheim. Mycelium thick- 

 walled, olive-green fruit-hyphae, black sporangia, and 

 oblong spores. 



Mucor macrocarpUS, Lichtheim. Spindle-formed, 

 pointed spores. 



Mucor fusiger, Lichtheim. Ovoid spores. 



Mucor mellittophorus, Lichtheim. Spores ellip- 

 tical. Found in the stomach of bees. 



Mucor COrymbifer, Lichtheim. Forms branched 

 fruit-hyphae ; sporangium has a smooth membrane. 

 Found in the external auditory meatus ; occurring also 

 upon bread. Pathogenic in rabbits. 



Mucor rhizopodiformis, Lichtheim. Occurs on 

 bread. The spores of Mucor rhizopodiformis and Mucor 

 corymbifer, when introduced into the vascular system of 

 rabbits, can germinate in the tissues, especially in the 

 kidneys, where they set up haemorrhagic inflamma- 

 tion. Dogs are immune, and only artificial mycosis 

 is known.* 



* Lichtheim, Zeistchr. f. Kim. Med., vii. ; Hiickel, Beitr. z. 

 Anat. u. Phys., herausgeg. v. Ziegler u. Nauwerck. 1885. 



