MICKOCOCCI 507 



f 



SAECINA AUKANTIACA 



I LIQUEFIES GELATINE | 



Authority. Koch. Employed by Fischer and Proskauer in their experi- 

 ments, ' Ueber die Desinfection mit Chlor. Brom.,' Mittheilungen a. d. Kaiser- 

 lichen Gesundheitsamt, vol. ii., 1884, p. 240. See also ' Studies on -some new 

 Micro-organisms obtained from Air,' Percy Frankland, Phil. Trans. Royal Soc.. 

 vol. clxxviii., 1887, p. 266. 



"Where Found. In air and Berlin white beer. Included by Lustig (loc. 

 cit.) amongst organisms found in water. 



Microscopic Appearance. Small hemispherical cocci arranged in twos or 

 fours, and in packets. The packets are much smaller than those of the Sarcina 

 lutea (see p. 506), and the complete packet of four measures only about 1-7 M 

 across. It is not motile. 



Cultures. 



GELATINE PLATES. On the fifth day small, round, yellow colonies are visible, 

 each of which exhibits a circular surface depression of varying size. Under a 

 low power they are circular and granular, with a slightly denticulated edge, 

 which in the less developed colonies are not so marked. (Percy Frankland.) 



GELATINE TUBES. After four days liquefaction has taken place along the 

 path of the needle, producing a funnel-shaped canal which is filled with clear 

 liquid, at the bottom of which is a flocculent orange deposit. 



AGAK-AGAE. Forms an abundant and moist and shining surface-growth of 

 a strong orange colour. The growth is for the most part continuous, but 

 numerous little heaps are distributed over the remainder of the surface. 



POTATOES. Grows very slowly, producing a golden yellow expansion 

 restricted to the seat of inoculation. 



BROTH. After nine days the liquid is turbid at the surface, but clear below, 

 with a dirty white deposit at the bottom. After eighteen days the deposit has 

 become of an orange colour. (Percy Frankland.) 



SAECINA LITOKALIS 



Authority. Oersted. 



"Where Found. In sea-water containing putrefying matter. 



Microscopic Appearance. Cocci 1-2 to 2/x in diameter, grouped together in 

 fours and eights, which may unite and include as many as sixty-four tetrads. 

 Plasma colourless ; in each cell one to four sulphur granules are visible. 



SAECINA HYALINA 



Authority. Kiitzing. 



Where Found. In marshes. 



Microscopic Appearance. Hound cocci, 2-5 /u in diameter. United in 

 groups of four to twenty-four cells, reaching 15 /* in diameter. Almost 

 colourless. 



SAKCINA EEITENBACHII 



Authority. Caspary. 



Where Found. On rotting water plants. 



Microscopic Appearance. Cocci about 1-5 to 2-5 fj. in diameter, at the time 

 of division lengthened to 4 p. Mostly united together from four to eight in 

 number ; occasionally sixteen or more. Colourless cell-wall, lined with rose- 

 red layer of plasma. 



