82 
Filaria loa 
DESCRIPTION OF PLATE IV. 
Fig. 1. A coiled embryo observed in the process of uncoiling and stretching the sheath. 
The irregular masses throughout the body of the embryo and deeply stained by fuchsin 
were not observed while the embryo was alive. 
Fig. ‘2. A mature embryo stained with a very dilute solution of fuchsin while alive. 
Some little granular masses at the head end, the periphery of the ovoid masses at the 
anterior and posterior V spots are the only portions that have been stained. 
Fig. 3. A mature embryo as seen in a wet blood preparation while alive. Two black 
specks at the cephalic extremity. A highly refractile conical papilla and ovoid mass 
with two dark specks separated sufficiently to cause the appearance of a V situated 
0’09 mm. from the head end and another but smaller ovoid mass, papilla and V 
situated 0'06 mm. from the tail end. 
Fig. 4. A mature embryo stained with a stronger solution of fuchsin. Irregular masses 
throughout the body, due to post-mortem changes, have been stained. The anterior 
ovoid mass has not taken up the stain whereas the posterior ovoid mass has. The 
intestine is seen throughout part of its course. 
Fig. 5. An embryo which did not exhibit the irregular masses shown in Fig. 4. The 
rudimentary intestine is deeply stained. 
