MUCORALES 111 



M^icor scarlatinosus Hallier, a very poorly described organism was sup- 

 posed to have been isolated from a case of scarlatina. It was quite probably 

 a contamination and has been refen-ed here as a possible synonym by A. 

 Fischer, 1892. M. racemosus was reported by Bollinger (1880) from the 

 respiratory tract of birds but was not pathogenic for laboratory animals, by 

 Zurn (1876) in the nasal cavity of a sheep, and by Frank (1890)' in a tumor 

 in a horse, but both determinations doubtful. Savoure (1906) reports that 

 it was not pathogenic for rabbits. 



Mucor pusillus Lindt, Arch. f. exp. Path, u Pharm. 21: 272. PL 2, Figs. 

 1-6, 1886. [Saprophyte.] 



M. ramosus Jakowski, Gazetta Lekarska No. 34: 1888. [Centralbl. Bakt. 

 II, 5: 388, 1889] not Lindt, I.e., p. 275. 



The fungus reported by Jakowski from the outer ear has been referred 

 here by Vuillemin (1904), while the original author and Barthelat (1903) 

 refer it to Absidia ramosa (Lindt) Lendner. 



Since there is so little conclusive evidence of pathogenicity, the reader 

 is referred to the systematic accounts of A. Fischer 1892, Lendner 1908, and 

 Povah 1917 for aid in determining cultures. 



ABSIDIA 



Absidia Tieghem, Ann. Sci. Nat. Bot. VI, 4: 350, 1876. 



Lichtheitnia Vuillemin, Bull. Soc. Myc. France 19: 119-127, 1903. 



Type: Absidia capillata Tieghem. 



Vuillemin (1903) divided this genus into six genera of which Lichtheimia 

 contained the parasitic fungi so far described. The characters on which the 

 separation was based seem comparatively trivial, and this segregation has not 

 been followed by systematists of the group, although recognized by some 

 medical men. 



Mycelium forming stolons, often branched, more or less curved producing 

 rhizoids more or less branched at the surface of the substratum; sporangio- 

 phores erect, usually in groups of 2-5 arising from the curved part of the 

 stolon, not from the place of origin of the rhizoids ; sporangia pyriform, erect, 

 with an infundibulifonn apophysis, membrane neither cutinized nor incrusted, 

 diffluent, leaving a small collar at the base ; columella hemispheric, conic, or 

 terminated by a single projection, continuous with the apophysis which is 

 cutinized and of deeper color than the sporangiophore ; spores small, oval 

 usually smooth, rarely echinulate, hyaline ; zygospores formed on the stolons 

 surrounded by circinate filaments, cutinized, growing from one or both of the 

 suspensors. This genus differs from Rhizopus by the development of the 

 sporangiophores from the internodes, by the pyriform sporangia, by the columella 

 continuous with the apophysis and by the suspensors provided with circinate 

 filaments. 



