080 NON-PATHOGENIC BACILLI. 



low the first, pushing it before it; this appearance is, however, due to 

 binary division of the vegetative cell before it has completely emerged from 

 the spore membrane. Characters of growth in solid media not given. Not 

 pathogenic for guinea-pigs. 



383. BACILLUS ALLANTOIDES (L. Klein). 



Obtained as an accidental contamination from a culture of Bacillus me- 

 gatherium from the air ? 



Morphology. Bacilli about 0.5 /< thick and three to four times as long as 

 thick; form chains of four to eight elements, the members of which are 

 rather widely separated from each other, but are firmly bound together by a 

 jelly-like membrane which is somewhat narrower than the rods. The rods 

 exhibit an intermittent to-aiid-fro movement ; subsequently they undergo 

 segmentation into spherical elements which are surrounded by a jelly-like 

 material and form sausage-shaped zoogloea masses. Characters of growth in 

 solid media not determined. 



384. BACILLUS OF SCHEUELEN. 



Found in cancerous tissues by Scheurleii ; upon the skin of healthy per- 

 sons by Bordoni-Uff reduzzi (Bacillus epidermidis) ; in scales of epidermis 

 from the nipple and in the mammae of healthy women by Rosenthal. 



Morphology. Bacilli from 1.5 to 2.5 ju long and 0.5 u- broad. 



Biological Characters. Anaerobic, liquefying, motile bacillus. Forms 

 long-oval spores. Grows very slowly at the room temperature best at 29 

 C. In gelatin stick cultures, at the end of eight to fourteen days, a funnel- 

 sliaped cavity is formed near the surface, which is covered by a wrinkled, 

 membranous layer, while but little liquid gelatin is contained in it. Upon 

 the surface of agar, at 39 C., at the end of twelve hours a dull, fissured, 

 colorless layer is developed. Upon potato, at the end of twelve to twenty- 

 four hours in the incubating oven, the whole surface is covered with a yel- 

 low, wrinkled layer ; the potato beneath this has a dirty-pink color. 



385. BACILLUS LACT1S ALBUS (Loffler). 



Found in milk. 



Morphology. Bacilli which average 3.4 in length and 0.96 /* in thick- 

 ness ; in milk grow out into long filaments ; resembles the bacillus of an- 

 thrax. 



Biological Characters. Anaerobic, liquefying, motile bacillus. Forms 

 large spores. Grows slowly in the usual culture media at the room tempera- 

 ture. In gelatin stick cultures liquefaction occurs slowly, and upon the 

 surface of the liquefied medium a whitish layer, made up of interlaced fila- 

 ments, is seen. Upon the surface of agar forms a tolerably thick layer 

 with thinner margins. Upon potato a thin, dry, white layer. In milk 

 causes coagulation and subsequent solution of the casein, and produces leu- 

 cin and ty rosin. 



38G. BACILLUS LIODERMOS (Loffler). 



Synonym. Gummibacillus. 



Found in milk 



Morphology. Resembles Bacillus mesentericus vulgatus small, thick 

 rods with round ends, in pairs or in jointed filaments. 



Biological Characters. An aerobic, liquefying, motile bacillus. Forms 

 spores. Grows rapidly at the room temperature. In gelatin stick cultures 

 causes rapid liquefaction in funnel form ; the liquefied gelatin is slightly 

 clouded and is soon covered with a whitish mycoderma. Upon the surface 



