SARCINA PULMONUM. 155 



in which the coarseness of the granules of the culture and 

 the size of the bales of packets continually increase; 

 entirely parallel with this is the series Sarc. alba, vari- 

 abilis, and canescens. l 



Sarcina pulmonum (Virchow, Mauser). 



(Plate 6, vi-x.) 



Literature. Hauser, "Deut. Arch. f. klin. Med.," XLII, 127 ; Stu- 

 benrath, monograph. 



Microscopic Appearance. Upon the various nutrient 

 media only small and not especially regular bales of 

 packets were formed. 



Motility. Young cultures exhibit exquisite waltzing 

 movement (Hauser) dependent, according to Job (Diss. 

 Wiirzburg, 1896), upon not very numerous, long, coiled 

 flagella. Older cultures, and quite often also young ones, 

 exhibit no motility. 



Growth. Very slow even at incubator temperature. 



Gelatin Plates. (a) Natural size: Extremely small, 

 roundish, yellowish-grayish-white, punctiform colonies. 



(b) Magnified fifty times. Superficial: At first roundish, 

 smooth border; gray, almost opaque, not different from 

 the deep ones. After two to three weeks the peripheral 

 part is lost from sinking in of the colony, and it then ap- 

 pears torn, and (especially at the edge) transparent, 

 coarsely crummy. Packets are not to be made out; color 

 gray. Deep : Roundish, gray, opaque, without any visible 

 internal structure (6, vni). 



Gelatin Stab. At first thread-like, and only after a 

 long time crummy; gray to yellowish-gray. Surface 

 groivth : After twenty days, 2 mm. to 3 mm. wide, gray, 

 transparent, roundish, serrated, faintly shining. Later it 

 begins to sink in (6, vi). 



1 We have not described a Sarc. ventriculi Goodsir because the 

 description given by Falkenhain (Arch, fur exp. Path. u. Phar. xix, 

 339), which was copied by Gruber, does not agree accurately with any of 

 our forms, and, as Oppler (Miinch. med. Wochenschr., 1894, No. 29, 

 570) first pointed out, the stomach contains a whole series of sarcinse. 

 (For .details thereon, see Stubenrath.) 



