ACTINOMYCETEAE 719 



Actinomyces cerebriformis Namystowski, Bull. Internal. Acad. Sci. Cra- 

 covie, CI. Sci. Math. Nat. 1909: 418-426, PI. 21, 1910. 



Isolated in a case of infection of the cornea. 



llyphae up to 1/a in diameter, spores ellipsoid, formed only on old potato 

 and beet cultures. 



Colonies on ordinary agar, either yellowish, pulvinate, cerebriform, con- 

 fluent or waxy, white, slightly elevated, with concentric growth rings. On 

 glycerol agar, colonies are flat, round, margin wavy, often irregular with 

 definite growth zones, wax white and of a waxy consistency. Colonies on 

 potato, ochre yellow to orange yellow, with a white efflorescence. Colonies 

 often almost spherical, 1 mm. in diameter or 2.5 mm. long and 0.5 cm. high, 

 folded. On beet and carrot, bright dirty yellow, pulvinate, confluent colonies. 

 In broth, colonies small, forming flocculent precipitate, medium remaining 

 clear. In liquid blood serum, a deposit of flakes, 1-2 mm. in diameter. Coagu- 

 lated serum not liquefied. Gelatin is liquefied, the colonies being smaller than 

 in blood serum. No growth on sugar agar, pear, or bread with glucose solution. 



It seems probable that the following unnamed species is the same as, or 

 closely related to, A. cerebriformis. 



Streptothrix sp. Bernardinis & Donna, Ann. Ig. Sperim. 15: 489-497, Pis. 

 8, 9, 1905. 



Oospora sp. Sartory, Champ. Paras. Homme Anim. 813, 1923. 



Isolated from a corneal ulcer caused by getting a piece of straw in the 

 eye. Not very pathogenic to rabbit 's eye. 



Colonies small, not over 1.5 mm. in diameter, slightly elevated, yellow, 

 with a regular margin. Deep colonies brown, granular, regular. On gelatin, 

 growth is similar but slower. On peptone agar, a yellow orange pigment de- 

 velops. Broth, with 1% glucose, becomes turbid, with a mass of flakes set- 

 tling out. Discrete growth on coagulated rabbit serum. Gelatin liquefied, 

 liquefaction beginning in 3-4 days. 



Actinomyces tossicus (Rossi) Dodge, n. comb. 



Actinomyces alhus var. tossica Rossi, Ann. Ig. Sperim. 9: 693-708, 1905. 



Oospora alba var. toxique Sartory, Champ. Paras. Homme Anim. 829, 830, 

 1923. 



Isolated from tumors in the abdominal cavities of domestic fowl. Patho- 

 genic to guinea pigs, rabbits, and chickens. 



On agar, grow^th dirty Avhite, round, adherent, margin areolate, opaque, 

 granulose, yellow brown, covered w^ith a snoAv white efflorescence. On potato, 

 growth same as on agar. On gelatin, colonies round and dirty yellow with 

 margin fringed. Broth remains limpid with round colonies adhering to the 

 glass, and a farinose, fragile pellicle. Starch liquefied but sucrose not in- 

 verted. Milk coagulated. Gelatin liquefied in one week. 



Actinomyces dermatonomus Bull. Australian Jour. Exp. liiol. 'Sled. Sci. 

 6: SOl-SU, 2 pis., 1929. 



