230 CLASSIFICATION OF THE MICRO-ORGANISMS. 



temperature without causing liquefaction; forms in stroke 

 cultivations broad raised stripes, with a moist, shiny, granular 

 surface, and wall-like raised margins. The colour of the 

 colonies is a distinct rosy red. 



Diplococcus albicans tardissimus. 



Cocci which are morphologically completely identical with 

 the micrococci of gonorrhoea ; the concave form of the division 

 in the diplococci is also present. They stick together some- 

 what more readily than the gonococci, and form small masses. 

 They grow extremely slowly on nutrient jelly, the inoculated 

 track only attaining the breadth of 1 mm. after some weeks. 

 On blood serum at the body temperature whitish points 

 develop after 2 or 3 days, which finally form thin greyish- 

 white, spots, with jagged contours and slightly moist surface. 

 Cultivated on several occasions by Bumm from pus from 

 the urethra, but quite harmless. 



A diplococcus has also been cultivated by E. Frankel* from 

 vaginal secretion which forms on nutrient agar a delicate 

 layer consisting of bundles branching off at right angles from 

 the line of inoculation ; it never grows in the deeper parts. 

 More detailed statements are as yet wanting. 



Miller has isolated a coccus from carious teeth which occurs 

 singly or in chains, and forms in nutrient jelly luxuriant 

 spherical colonies, in the neighbourhood of which the gelatine 

 becomes pulpy ; also another which forms irregular masses, 

 and very quickly liquefies the gelatine so that a funnel-shaped 

 depression appears in the tubes 4 6 hours after the inocu- 

 lation, and after 36 hours a broad canal filled with fluid 

 reaches to the bottom of the glass. See below. 



We may also mention 



Ascococcus Billrothii. 



The small spherical cells (micrococci) are united to form 

 peculiar colonies. On the surface of nutrient solutions it 

 forms a creamy skin in which numerous bodies of spherical 

 or oval shape can be distinguished even macroscopically. 

 Under the microscope it is evident that each of the bodies 

 consists of an extremely resistant envelope 10 15 jt. in thick- 

 ness, jelly-like and cartilaginous ; one or several spherical 

 * Deutsche med. Woch., 1885, No. 2. 



