314 SUMMAKY OF CURRENT RESEARCHES RELATING TO 



white or yellowish on gelatin, which is liquefied. It grew well on other 

 media. Milk was coagulated, the serum turning yellowish green. It 

 grew best at 37° ; and is pathogenic to mice. 



(3) Bacillus piscium pyogenes sp. n., isolated from sea-fish, is a 

 thick motionless rodlet with rounded ends. It grows best at room 

 temperature on ordinary media. Gelatin is liquefied, and indol is formed 

 in bouillon and in pepton solution. It is pathogenic to guinea-pigs. 



(4) Bacillus aquatilis albus sp. n., isolated from tap-water, is a thick 

 long rodlet with rounded ends, and is remarkable for the variety of its 

 involution forms. It is motile, and stains well by Gram's method. It 

 grows well on most media except potato. On gelatin its appearance is 

 indistinguishable from that of B. typhosus. In large doses it is patho- 

 genic to guinea-pigs, causing pneumonitis, pericarditis, and enteritis. 



Non-pathogenic bacteria : — 



(5) Micrococcus albus sp. n. was isolated from the heart-blood of a 

 pigeon. It stains well, and thrives at high and low temperatures. It 

 was cultivated on the usual media. 



(6) Micrococcus subfuscus sp. n. was isolated from the air. It stains 

 well and also by Gram's method. It grows well at high and low tem- 

 peratures on the ordinary media. The growth is yellowish on gelatin 

 and on agar. 



(7) Bacillus tolens sp. n. was isolated from sea-fish ; it is a medium- 

 sized rodlet with rounded ends, and on salinated agar vibrio and spirillum 

 forms occur. It is motile and stains well, but not by Gram's method. 

 It thrives on all ordinary media at room temperature, but grows poorly 

 at incubation. On gelatin the superficial growth is at first bluish-white 

 and iridescent. The deeper colonies are yellowish. Milk is not coagu- 

 lated. Potato is stained brown. All the cultures exhale a characteristic 

 odour of truffles. 



(8) Bacillus coli non-fervoris sp. n., isolated from the intestine of a 

 guinea-pig, is a medium-sized rodlet with rounded ends. It does not 

 stain by Gram's method. It grows well at high and low temperatures 

 on all the ordinary media, and very well on salinated agar. Milk is 

 not coagulated. 



(9) Bacillus saliphilus sp. n. was isolated from the heart-blood of a 

 guinea-pig ; it is a thin short somewhat bent rodlet with rounded ends. 

 On 3 p.c. salt-agar capsules appear after three days' cultivation. It grows 

 best at 37°, and thrives on all media, especially on salinated agar. On 

 gelatin the growth was white to yellowish, and on potato yellow or 

 orange. 



(10) Bacillus testudiniformis sp. n. was obtained from a copper coin, 

 and was only found once ; it is a thin rodlet with rounded ends. It is 

 motile, and grows better at 37° than at 22°. On gelatin plates the 

 colonies are yellowish, and in shape resemble a tortoise-shell surrounded 

 by a shimmering zone. 



(11) Bacillus annulatus albus sp. n. was frequently isolated from 

 nickel coins ; it is a motile rodlet resembling the typhoid bacillus ; it 

 grows better at 37° than at room temperature. It grows well on gelatin, 

 agar, bouillon, and grape-sugar-bouillou, but badly on potato. 



(12) Bacillus nummorum sp. n. was often cultivated from copper 

 coins; it is motile, resembles the ha^ -bacillus, and often forms long, 



