496 GENERAL SYSTEMATIC BACTERIOLOGY 



p. 282) is as follows: "Hyphae fertiles erectae virgato ramosae, ramis 

 ramulisque spiraliter tortis. Conidia globosa v. ovoidea, in ramulis 

 solitaria acrogena, subinde pleurogena, sessilia v. stipitellata, fusca." 

 Several species of this genus are listed in Saccardo's Sylloge Fungorum. 



Cohn (1875, p. 186) used the generic name Streptothrix for a totally 

 distinct organism, one of the thread bacteria producing concretions 

 in the lachr^anal duct, with the name Streptothrix Foersteri. This 

 species is described by De Toni and Trevisan (1889, p. 928) as follows: 

 "Filamentis tenuissimis, hyalinis, parallele insimul stratiformi-coalitis 

 rectis vel incurvis, sparse irregulariterque ramosis, in fragmenta in- 

 aequaUa secedentibus." 



Cohn (1875) confused somewhat this genus with Cladothrix by his 

 statement that the filaments are cylindrical, colorless, and with false 

 branching. He included it in his tribe Nematogenes. 



Trevisan (1879, p. 139) gave the generic description: "Somatia 

 cylindrica, leptotrichoidea, indistincte articulata, tenerrima, stricta 

 vel auguste spiralie parce ramosa." He included this genus in his 

 subtribe Cladothriceae. 



Magnin (1880, p. 97) states the filaments to be in the form "of Lep- 

 tothrix, very slender, colorless, not articulated, straight or slightly 

 spiral, a little branched." 



Much confusion has arisen in the literature of recent years due to 

 the confusion of Streptothrix Corda, Streptothrix Cohn, Oospora Wall- 

 roth, Actinomyces Harz, Nocardia Trevisan, Cladothrix Cohn. 



It is probable that all uses of the name Streptothrix not in accord 

 with the organism named by Corda are invalid. Many authors have 

 used Streptothrix in place of Actinomyces (q.v.). 



De Toni and Trevisan (1889) used the generic name Nocardia. 



Gasperini (1889, p. 449) identified the Streptothrix Foersteri of Cohn 

 as a common air form. 



Sauvageau and Radais (1892, p. 246) called attention to the use of 

 Streptothrix by Corda, and urged that the Streptothrix of Cohn was 

 a synonym of the older name Oospora Wallroth. 



Migula (1894, p. 237) says: "Streptothrix Cohn. Zellen zu einfachen 

 unverzweigten Faden vereinigt. Teilung nur nach einer Richtung 

 des Raumes. Endosppirenbildung oder eine sonstage besondere Fort- 

 pflanzungsform fehlt." 



Migula (1897, p. 47) gives the following diagnosis of Streptothrix: 

 "Zellen zu einfachen, unverzweigten Faden vereinigt. Teilung nur 

 nach einer Richtung des Raumes. Fortpflanzung durch bewegungslose 



