O. V. Huffman 
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larger than the nucleus which is crowded to one side, containing 
granular matter and small rod-shaped bodies. These animals upon 
again being placed in the dry buckets soon showed a recession in the 
number of Kurloff-bodies present. 
Figures 1—11. Sketched hij aid of Camera Lucida. x 1000. 
Fig. 1. Mononuclear leucocyte witli three azurophilic granules in protoplasm.—Fig. 2. 
The same with two azurophilic granules in protoplasm, one being double.—Fig. 3. 
KurloS-body of moderate size, i.e. smaller than the nucleus of the mononuclear 
leucocyte w’hich contained it.—Fig. 4. Kurloff-body with granular contents and 
rod-like bodies.—Fig. 5. Two small azurophilic Kurloff-bodies, and one large one 
which is stained purple by Giemsa and appears to have an unstained double-contoured 
wall.—Fig. 6. Kurloff-body, with granular contents and rod-like bodies produced by 
fixation before the blood film had dried.—Fig. 7. Two small vacuoles in protoplasm 
between nucleus and Kurloff-body.—Fig. 8. Eed blood corpuscles sketched to give 
comparative size of leucocytes and Kurloff-bodies.—Fig. 9. Most common form of 
Kurloff-body, i.e. about the same size as the nucleus, homogeneous and stained a 
lighter shade of purple than the nucleus by Giemsa’s stain.—Fig. 10. Vacuole in 
protoplasm between periphery and Kurloff-body.—Fig. 11. Last stage of Kurlofi- 
body. 
Furthermore, I made a complete study of the intestinal contents, 
excreta, and body juices of a large number of Gyrojms gracilis, G. ovalis, 
Gtenocephalus canis, Geratophyllus fasciatus, and Acanthia lectularia 
which had fed on guinea-pigs containing a high percentage of Kurloff- 
bodies. In the case of the lice and their ova, they were experimented 
with on the hypothesis that an organism might be liberated when the 
egg is ingested by the guinea-pig: sealed preparations of lice and ova 
mixed with gastric juice were observed; and a large number of lice 
were fed to a guinea-pig having few Kurloff-bodies, but nothing was 
discovered. 
Another hypothesis suggested itself to me by finding in several 
instances moulds and yeasts in the spleens of guinea-pigs immediately 
