SPIROCHETA BALBIANII AND SPIROCHETA ANODONTA. 69 
EXPLANATION OF PLATES 1—3, 
Illustrating Mr. H. B. Fantham’s paper on “Spirocheta 
(Trypanosoma) balbianii (Certes) and Spirocheta 
anodontz (Keysselitz): their Movements, Structure, 
and Affinities.” 
All figures were outlined with Zeiss’s camera lucida, using the 2 mm. or 
3 mm. apochromatic homogeneous immersion objectives, and compensating 
oculars 4, 8,12, or 18 of Zeiss. Figures 1 to 28 are of Spirochata bal- 
bianil; figures 27 to 40 of 8. anodonte. 
PLATE 1. 
Fic. 1.—Typical form of 8. balbianii, with membrane close to the body, 
but one end curled. Absol. ale. fixation; Leishman stain. x 1500. 
Fic. 2.—Parasite showing myonemes in the membrane. The thickened 
edge of the membrane is turned (folded) over at one point. Myoneme fibrils, 
some of which are perhaps slightly thickened, are seen on the periplast of the 
body at my. Iron Hematox. x 1500. 
Fig. 3.—Parasite showing myonemes plainly. In the middle of the body 
the ‘ zigzag’’ character of. the nucleus is plainly seen. Long staining with 
Leishman’s stain, and very careful focussing were necessary. x 3000. 
Fie. 4.—Short form, with membrane closely attached to the body, especi- 
ally visible along one side. Chromatin only indistinctly seen. Iron Heematox. 
x 1500. 
Fig. 5.—Specimen showing myonemes in the membrane. The nucleus 
appears irregular, and is not clearly distinguishable throughout the length of 
the organism, possibly on account of the darkly staining background (Iron 
Hematox. used). A spiral nuclear filament is seen for a short space in the 
middle of the body. A well-defined basal granule (4.7.) occurs at each end. 
The spiral winding of the membrane is also well shown where it crosses both 
above and below the body. x 2000. 
Fie, 5a.—Parasite with well-marked membrane, body-myonemes, and 
scalariform condition of the. nucleus. The membrane exhibits numerous 
twists and folds. Myonemes—separate from those of the membrane—show 
plainly on the body at my. The myonemes of the membrane, indeed, are 
scarcely visible. A basal granule (4.g.) occurs at either end, and a centro- 
some (cen¢.) at one end. Gentian-violet. x 2500. 
Fig. 6.—Specimen much coiled on itself (into a sort of S-shape), and there 
