FAMILY MYCOBACTERIACEAE 



891 



tubercle bacilli which are both acid- and 

 alcohol-fast. Later observers (Bynoe, 

 Thesis, McGill University, Montreal, 

 1931) have not found this a valid dis- 

 tinction. 



Mycohacteriuni smegmatis var. muris 

 Galli-Valerio. (Cent. f. Bakt., I Abt., 

 Orig., 75, 1915, 49.) From the preputial 

 glands of the black rat {Mus rattus) . 



Mycobacterium stercoris Bergey et al. 

 (Mist Bacillus, Moeller, Berlin, thier- 

 arztl. Wochnschr., 1898, 100; Mycobac- 

 terium stercusis (sic) Bergey et al., 

 Manual, 1st ed., 1923, 378; Bergey et al., 

 Manual, 4th ed., 1934, 542.) From 

 manure . 



Mycobacterium testudims Friedmann 

 and Piorkowski. (See Haag, Cent. f. 

 Bakt., II Abt., 71, 1927, 5; apparently 

 the same as Mycobacterium testudo, loc. 

 cit., 10.) This is probably Mycobacte- 

 rium friedmannii. From turtles. 



Appendix II: Krassilnikov (Mikro- 

 biol., 7, 1938, 335; and Ray Fungi and 



Related Organisms, Izd. Acad. Nauk. 

 Moskow, 1938, 121-130) describes a 

 genus Mycococcus distinct from Hans- 

 girg's (Osterr. Bot. Ztschr., S8, 1888, 

 266) family Mycococcaceae (which is 

 related to the fungi) and distinct from 

 Mycococcus Bokor (Arch. f. Mikrobiol., 

 1, 1930, 1). 



Mycococcus Krassilnikov includes 

 species that produce coccus-like cells, 

 genetically related to the species included 

 in Mycobacterium; reproduction is by 

 fission or budding in different directions, 

 often forming short, irregular chains with 

 side branches; in old cultures, the vege- 

 tative cells change into resting cells, the 

 latter germinating in a manner similar 

 to the spores of actinomycetes. Seven 

 species are listed, with incomplete de- 

 scriptions. Mycococcus ruber, M. capsu- 

 latus, M. luteus, M. citreus and M. albus 

 are described in Krassilnikov's original 

 paper. One of these {Mycococcus luteus) 

 is dropped in his later monograph while 

 descriptions of two new species are added 

 (Mycococcus tetragenus and M. mucosus). 



