98 SPIROCELETES. 



tumours, but are passed from mouse to mouse in inocu- 

 lating the growths. Calkins identified them with Sp. 

 microgyrata (see below). 



SPIROCH^ETA GONDII. 



(Nicolle, 1907.) 



Nicolle found spirochaetes in the blood of the rodent, 

 Ctenodactylus gondi. They measured 16 to igji in 

 length by 0.3^ in breadth. 



SPIROCH^ETA CULICIS. 



(Jaffd, 1907.) 



Jaffe found in the alimentary canal of the gnat spiro- 

 chaetes visible with a comparatively low magnification 

 (X 220). They were flattened, band-shaped organisms, 

 showing deeply stained granules in their protoplasm 

 when treated with Giemsa's stain. Their movements 

 were lashing, undulating, and "cork-screw-like." They 

 were not furnished with an undulating membrane, and 

 no examples of division were seen. 



SPIROCH^TA MINEI. 



(Prowazek, 1910.) 



These organisms are found in the stomachs of 

 "worker" and "soldier" ants (Termes lucifugus, Rossi) in 

 Japan. They are from 15 to 5o/x in length, by 0.3 to i/j. 

 in breadth. The extremities are pointed and chro- 

 matin granules are seen in the protoplasm. Division 

 is longitudinal and rolled up forms and rosettes are 

 found. 



SPIROCH^TA GADI. 



(Neumann, 1909.) 



This organism, found in the fish, Gadus minutus, 

 resembles Sp. gallinarum, measuring 10 to i6/* in length, 



