occur in the eyes, but the eggs pass through the lachrymal ducts and 
are swallowed, escaping in the droppings. Filaria gallinarum is a 
spirurid, not a Filaria, but its description does not permit of its assign¬ 
ment to a genus of spirurids at present. The dimensions of some of 
these spirurid eggs in microns are as follows: Filaria gallinarum 
(chicken), 40 by 24; Oxyspirura mansoni (chicken, turkey, peafowl; 
U. S.), 50 to 65 by 40 to 45 (Fig. 60); O. parvovum (chicken), 33 to 45 
50m, 
Fig. 58. Davainea cesticillus. Egg in capsule. From Lopez Neyra, 1920. 
by 25 to 30; Streptocara pectinifera (chicken, guinea fowl), 33 by 20; 
Gongylonema ingluvicola (chicken; U. S.), 50 by 36; Dispharynx 
spiralis (chicken, guinea fowl, pigeon), 36 to 40 by 19 to 21; Cheilo- 
spirura hamulosa (chicken; U. S.), 30 by 20; Tetrameres fissispina 
(duck, turkey, chicken, pigeon), 50 by 28; T. confusa (chicken, turkey, 
pigeon), 33 by 24; T. gigas (duck) 50 by 21; Physaloptera bulbosa 
(peafowl), 44 by 26. 
54 
