ILLUSTRATIONS 
[Plates 1, 2, and 3 are reprinted from Tropical Diseases by the kind permission of Messrs. 
Cassell & Company, Limited; Plate 11 is from a photograph by Dr. J. M. Howie; Plate 15, 
from a photograph by Dr. P. B. Cousland: Plate 16, from a photograph by Dr. J. H. 
Montgomery; Plate 25, from a photograph by Canton Hospital staff; and Plate 26, 
from a photograph by Dr. E. J. Strick.] 
PLATE 1 
Anatomy of Filaria bancrofti embryo. a, sheath; 6b, central viscus; c, V 
spot; d, tail spot. 
PLATE 2 
Fig. 1. Section of thoracic muscles of mosquito about twelve days after 
it had fed on a filariated patient. 
2. Filariz in head or proboscis of mosquito. a, filarie; b, labium; 
c, labium; d, base of hypopharynx; e, duct of veneno-salivary 
gland; /, cephalic ganglia; g, eye; h, esophagus; j, pharyngeal 
muscles. 
PLATE 3 
Metamorphosis of filaria in mosquito. a, b, c, d, e, f, progressive forms 
| of the parasite. * 
PLATE 4 
Section of a varicose groin gland, showing great dilatation of vessels, 
both lymphatic and blood vessels, with hyperplasia of the gland 
tissue; x 60. . 
PLATE 5 
Fig. 1. Section of skin just becoming affected with elephantoid changes, 
showing a tendency to round-cell infiltration, with dilatation of 
lymph spaces. x 60. The large space is a defect in the section. 
2. Section of skin from fully developed elephantiasis scroti, showing 
dense fibrous felting with thickening of the epithelial layers 
and cerium. xX 60. 
PLATE 6 
Early elephantiasis scroti, showing the scar of a filarial abscess of the 
scrotum on the right side. 
PLATE 7 
Lymph scrotum. In this case the swelling of the groin glands is not 
marked. There is some cedema of the preputial skin, and the 
vesicles on the scrotum are well shown. 
PLATE 8 
Lymph scrotum; penis unaffected. Shows well the lax, edematous look 
that some of these cases present. The dark patch is due to 
iodine, which had been painted over large and aching groin glands. 
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