GENERAL SYSTEMATIC BACTERIOLOGY 297 



not been later recognized, the name Dispora may be regarded as a 

 nomen nudum, or possibly as a synonym of Bacillus Cohn. it is 

 rejected by Erwin F. Smith (1905, p. 174) and by Viiillemin (1913, 

 p. 520). 



Douglasillus. The fourth genus of the subfamily Clostridioideae 

 proposed b}- Heller (1922, p. 14) with the foUovving description: 



Clostridioideae that do not liquefy gelatin. They produce little gas in meat 

 medium. They may not clot milk. Gram-negative bacilli which are frequently 

 fusiform, and may show peculiar involution forms. Spherical spores are formed 

 in the bacilli; the rods are usually widened by the spores so that their sides are 

 not parallel. Young spores may not be truly spherical. Occasionally found 

 in moulds. Probably incapable of invading tissue. 



Type species sphenoides {Bacillus sphenoides Douglas, Fleming and Colebrook), 

 as described by the Committee (p. 43) : the type which ferments glucose, maltose, 

 galactose, lactose, salicin, mannitol, sucrose, dextrin and starch. 



Drepanospira. A generic name used by Boris de Petschenko (1911, 

 p. 249) to designate a species of bacterium, Drepanospira Mulleri 

 found to be parasitic within the bodies of paramoecia, and having a 

 relatively complex life cycle. Enlows (1902, p. 39) is apparently in 

 error in writing Drepanospora. She states: 



Order Eubacteria, fam. Spirillaceae occupying an intermediate place between 

 Spirosoma Migula and Microspira Schroter. Cells with 2 spirals, one end pointed, 

 the other somewhat rounded. No cilia or flagella. Helicoidal motion. "Pas 

 de division cellulaire." Endospores. Regular spherical colonies formed by the 

 individuals in certain stages of development. Measure 7n long by O.lBn wide. 

 Cell membrane visible on the living cell. In the vegetative state protoplasm 

 composed of an anterior, smaller, strongly refractive part, and a larger posterior 

 or dull part. The anterior portion he considers to be nuclear. 



Dysenteroides. The fourth genus of the tribe Ebertheae proposed 

 by Castellani and Chalmers (1919, p. 934). The description (p. 938) 

 is as foUows: 



Definition. Ebertheae fermenting glucose and lactose partially, with the pro- 

 duction of acid, but no gas. Milk not clotted. 



Tj'pe Species. Dysenteroides metadysentericus (Castellani, 1917). 



Ebertheae. The ninth tribe of the family Bacillaceae proposed by 

 Castellani and Chalmers (1919, p. 932). The description given follows: 



Bacillaceae growing well on ordinary laboratory media; not forming endo- 

 spores, aerobes, and often facultative anaerobes; without fluorescence, pigment 



