36 THOMPSON YATES LABORATORIES REPORT 
and appears structureless. The front end is bluntly rounded ; and has no prepuce 
nor spine : the tail end tapers gradually from almost the middle of the worm to the 
tip of the tail. 
In stained specimens (plate IX, fig. 3) the embryos set in characteristic 
comma-like position. The embryos measure 97*8 m in length. 
The head end does not show a baying, but simply a looseness in the cell 
arrangement. The following spots are always present : 
1. A small central irregular clearing, at distance 22*5 percent, of length. 
2. A similar central irregularly shaped clearing, larger than the first, 
distance 23'5- 
3. The largest spot, oval in shape, distance 60*7. 
4. A tail spot, the second largest, well marked, oval, at 81*8 
Filaria capsulata. Nov. Sp. 
Definitive hosts-: Pyenonotus barbatus. 
Sitagra brachyptera. 
Hypbantornis. Sp. incert. 
Sites. In Pyenonotus barbatus, in the tissues between the oesophagus and spinal 
cord, were found three bundles which microscopically appeared to consist of a thin 
membranous capsule containing a worm or worms coiled up. These on dissection 
were found each to consist of a thin connective tissue capsule with two worms, a long 
one and a short one coiled up, in its interior. 
In another bird of the same species were found five encysted worms between 
the oesophagus and spine ; there was no free worm, but on dissection of one of these 
cysts the head of a worm was found to project about i - o mm. length out of the cyst. 
One of the cysts was very small ; another large one contained a yellow coloured 
lightly mottled worm. 
In still another bird of this species ten flattened masses were found in similar 
positions ; they looked like bags of whitish jelly containing coiled worms. They 
were directly subcutaneous or on the muscle fascia with delicate fibrous tissue bands 
anchoring them to the tissues below, so as to permit of some movement but requiring 
dissection for removal. The positions in which they were found were : — one on the 
back of the head, three in the neck, two between the trachea and muscles of the 
spinal column, another at the base of the neck, one at the lower edge of the 
pectoral muscular mass laterally, two on the thigh. 
Apparently each sack contains two worms ; some of these were purposely 
torn across — characteristic ova and embryos issued from the ruptured uterus. 
In Sitagra brachyptera in a single case the site was lower down the oesophagus — 
a cyst of yellowish colour was found between oesophagus and liver. This bird also 
contained embryos and adults of F. spiralis and F. spiralis major. 
