DISEASES OF POULTRY. 



43 



Fig. 6.~D, trachea of plieasaut opened to show syngames (two-thirds nat- 

 ural size). I, ova in different stages of development, a, segmented Titellusi 

 b, granular -vitellus becoming constricted at middle, c, ovum with embryo 

 fully developed, rf, ovum with valve at extremity detached and embryo 

 emerging; K, embryos, a, directly after leaving egg, ^, undergoing the first 

 molt, c, nymph with rudiments of genital or^an showing at x\ L, diagram 

 illustrating manner of removing syngames with wire, hoise-hair or feather. 



