GENERAL SYSTEMATIC BACTERIOLOGY 377 



It is probable that Micrococcus Cohn should be recognized as a 

 genus with the type Micrococcus lutsus (Schrdter) Cohn. This type 

 designation is menaced by the fact that Cohn's first species described 

 was Micrococcus prodigiosus. This form, however, is not a typical 

 Micrococcus in that the cells are not spherical. Under the circum- 

 stances, the designation of the second species described, M. luteus 

 is probably justified and valid. 



Bergey et al. (1923, p. 58) has followed the Committee, including 

 Micrococcus as the first genus of the tribe Micrococceae. 



Microhaloa. A genus of blue green algae created by Kiitzing (1843, 

 p. 169) with the following description: "Phycoma globosum, grumosum, 

 ex cellulis in glomerulos coadunatis compositum." Two species are 

 included, M. botryoides and M. rupestris. Its only relationship to 

 bacterial nomenclature is the reference to it of the organism Lampro- 

 cystis roseopersicina under the name Microhaloa aeruginosa Kiitzing. 



The name is rejected by Erwin F. Smith (1905). 



Micromyces. A generic name first applied to a fungus parasitic 

 upon algae by Dangeard (1888, p. 55) with the species M. zygogonii 

 Saccardo gives the following generic diagnosis: 



Sphaerulae plasmaticae intracellulas Algarum parasiticae, membrana aculeata 

 T. verrucosa. Cellulae maturitate evacuantur et plasma, membranam tangens, 

 sporangium compositium efficit; sporangium 4- cellulare, cellulae 100 zoosporaa 

 uniciliatas gignentes. 



The name Micromyces was independently proposed by Grliber as 

 a generic name for a new organism which was isolated from man and 

 showed great resemblances to Actinomyces (1891, p. 648). The species 

 was named Micromyces Hoffmanni. This name as applied to one of 

 the thread bacteria is invalid because of the previous use of Micromyces 

 Dangeard for a distinct group. It is also a synonym of Actinomyces. 

 It is rejected by Merrill and Wade (1919, p. 63). 



Microphyta. A name included in the list of those rejected by Erwin 

 F. Smith (1905). No reference to its use as a generic name has been 

 found. 



Microsiphonales. An order of fungi named by Vuillemin (1912). 

 Castellani and Chalmers (1919, p. 1040) give the following description. 



Definition. Hyphales with the mycelium composed of fine bacilliform hyphae, 

 usually 1 micron or less in diameter. Usually Gram-positive, when young, and 

 without distinct nuclei. Parasitic on man, animals, and plants, or saprophytic. 



Remarks. This is a most interesting order, as its members are nearly always 

 mistaken at first sight, by persons unaccustomed to them, for bacilli. Hence the 



