MICROCOCCUS LACTEUS FAVIFORMIS 225 



our culture media, but grow slowly ; and gelatine is lique- 

 fied, also slowly. Not until a week has elapsed do sulphur- 

 yellow punctiform colonies, whose border appears fibrous 

 under low powers, show themselves on the gelatine plate. 

 In thrust- cultures a yellowish raised deposit with a dull 

 surface appears after three days, and gradually spreads ; no 

 growth can be seen along the needle-track. A greyish- 

 white raised layer develops upon agar even in twenty-four 

 hours, and assumes a yellow colour after some days. On 

 potato a smooth, spherical, sharply -defined deposit forms, 

 which adheres to the needle and is very viscid. Serum is 

 liquefied. 



Irrespective of these biological peculiarities, the Diplo- 

 coccus subjiaviis may be distinguished from the gonococciis 

 by the fact that it does not give up its stain under Gram's 

 process. 



Micrococcus laeteus faviformis. — Bumm has very often 

 found in the vaginal secretion diplococci which show a 

 tremulous motion. When examined in the hanging drop 

 they exhibit a propensity to unite in a clump which forms the 

 figure of a honeycomb. Gelatine is not liquefied, and the 

 colonies on the plate are small and evenly circular. Little 

 white dots form upon thrust-cultures even in one day, and 

 later unite into milk-white islets. A milk-white layer 

 develops also upon agar and potato. The diplococci do not 

 surrender their colour under the application of Gram's 

 process. 



Diplococcus albicans amplus. — A not uncommon guest in 

 the vaginal secretion is the coccus of this name discovered by 

 Bumm, the elements of which are differentiated from the rest 

 of the diplococci by their considerable size. Gelatine is slowly 

 liquefied, and the gelatine plate shows greyish-white, some- 

 what elevated islets. In thrust-cultures a moist coating 

 appears on the surface and a white stripe along the needle- 



Q 



