GENERAL SYSTEMATIC BACTERIOLOGY 409 



The organism was found quite constantly present in the intestinal 

 contents of cavies at the Pasteur Institute in Paris. 



Oxydobacteriaceae. The first family of the order Ceyhalolrichinae 

 named by Orla-Jensen (1909, p. 329). It includes those obligate 

 aerobic bacteria which oxidize carbon, nitrogen or hydrogen com- 

 pounds without the production of noteworthy amounts of unoxidized 

 spHt products. None of the organisms produce thread-like filaments 

 or produce a mycehal growth. 



Pacinia. A genus of bacteria named by Trevisan (1885, p. 83) 

 to include the organism which causes Asiatic cholera. The original 

 generic description is: 



Tre stadi di sviluppo vegetative : 1. Bacilli, 2. Filamento, 3. Cocchi. Bacilli 

 (stadio protoplastico tepico) cilindrici, piu o meno ricurvi, inarticolati, incolori, 

 biformi; lunghi (macrobacilli) e corti dio transitorio irregolarmente flessuoso- 

 ondulato-anglosi risultanti da piu bacilli runasti im conguinzione per incompleta 

 divisione transversale. Cocchi (stadio finale) derivati da michrobacilli, dap- 

 parima in brevi monifi, indi liberi. Spore provenienti tauto nei microbacilli 

 quanto nei cocchi. 



The first species named is Pacinia cholerae asiaticae. As synonyms 

 he notes Vibrio cholerae Pacini (1854) and Bacillus cholerae asiaticae 

 Trevisan. Other species described are Pacinia Finkleri of cholera 

 mostras, P. Lewisii from saliva, and P. Cecii from cholera stools. 

 Later (1889, p. 23) this genus was included as the tenth of the tribe 

 Bacillee, with the description "Baculi cilindrici, non mai spirali, con 

 protoplasma uniformemente diffuso. Spore macrosome provenienti 

 in una estremita intumescente a guisa di capocchia, di rado in 

 entrambe le estremita, di baculi normali immutati." Sixteen species 

 were listed. 



De Toni and Trevisan (1889, p. 1015) give as synonyms Dispora 

 Kern and Microspira Schroeter. The generic diagnosis given is: 



Baculi cylindrici, nunquam spiraliter torti, plasmate uniformiter diffuso foeti. 

 Sporae (arthrosporae) macrosomae, ex uno apice (raro utroque) capituli ad instar 

 intumescentes, in baculis normalibus immutatis ortae. 



The genus is divided into two sections, Eu- Pacinia with 11 species 

 and Pseudospira with 8 species. Among the species of the first section 

 are P. putrifica, P. Loeffleri (diphtheria bacillus) and P. caucasica. 

 The second section includes Pacinia cholerae-asiaticae as its type. It 

 corresponds quite exactly to the Microspira of Schroeter and Migula. 



