MICKOCOCCI 505 



MICEOCOCCUS VITICULOSUS 



Authority.— Katz and Fliigge, Die Mikroorgajiismen, 1886, p. 178. 



Where Found.— Occasionally in air and water. 



Microscopic Appearance. — Oval cocci of variable dimensions, the largest 

 being about 1*2 (x in diameter, and the smaller ones 1 [j.. Forms closely-packed 

 masses of zoogloea. 



Cultures. — 



Gelatine Plates. — The depth colonies exhibit fine hairy ramifications, which 

 extend from the centre of the colony to some distance into the surrounding 

 gelatine and form a very fine and delicate network. Under a low power these 

 ramifications are seen to consist of zoogloea masses of various dimensions and of 

 irregular contour, arranged side by side. The surface colonies form a thin 

 cloud-like expansion, opaque and whitish, from which fine threads penetrate 

 into the depth of the gelatine. No liquefaction ensues. 



Gelatine Tubes. — A delicate network appears in the depth, which soon be- 

 comes covered up by the more rapidly growing surface expansion. Along the 

 path of the needle in the depth radial extensions resembling a feather make 

 their appearance. 



Potatoes. — Forms a dirty white dry expansion, which grows quickly. 



SAECINA ALBA 



I LIQUEFIES GELATINE 



"Where Found. — In air and water. 



Microscopic Appearance. — Small cocci arranged in twos or fours. 



Cultures. — 



Gelatine Plates. — Grows slowly, giving rise to small round white colonies. 

 Slight liquefaction slowly ensues. 



Gelatine Tubes. — Grows only slightly in the depth, but produces a white 

 raised circular growth on the surface. 



Potatoes.— Grows very slowly, producing a whitish yellow expansion, 

 restricted to the point of inoculation. 



SARCINA CANDIDA (Eeinke) 



LIQUEFIES GELATINE 



Authority.— Lindner, Die Sarcine-orgamsmen der GCCrungsgewerhe, Berlin, 

 1888. 



"Where Found. — In a water reservoir supplying a brewery ; also in air in 

 the vicinity of breweries. 



Microscopic Appearance. — Occurs as cocci, or diplococci and tetrads. The 

 individual cells have a diameter of 1-5 to 1-7 fi. They are only arranged in the 

 three dimensions of space, in particular culture media (decoction of hay). 



Cultures. — 



Gelatine Plates. — Forms shining white colonies surrounded by a circle of 

 liquid gelatine. Later they become yellowish in colour. 



Gelatine Tubes. — Resembles the growth of the Pediococcus albus (see 

 p. 494). 



Agab-agab. —Forms a white, moist, shining expansion with a smooth rim. 

 No pellicle forms on the condensed water. 



