340 BOARD OF AGRICULTURE. 



Frequently, when no worms were discovered, the eggs were 

 abundant in the thick mucus-looking fluid in the pelvis of 

 the kidney. This fluid contained, besides eggs, desquamated 

 renal tubules, or casts and oily granules. 



•In no instance have I found worms in an immature state, 

 which shows that the eggs, in all probability, go through some 

 other host before they enter the swine, to become sexually 

 mature.* 



The symptoms in hogs, which are referred to the " kidney- 

 worm," are due to a paralysis of motion in the hind legs ; 

 the hog draws the hind quarters along the ground from place 

 to place in search of his food, although it is by no means 

 proven that the worm is the real cause, unless we be able to 

 demonstrate its existence in some cerebro-spinal center, or 

 some point more likely to destroy the reflex power in the cord 

 itself. 



Structure. — The head and oral cavity are alike in male and 

 female. The oral cavity is rather oval than round, and is 

 surrounded by a hexagonal frame, each corner having a pa- 

 pilla and booklet, while each side is armed with six serrate 

 teeth. 



Looking into the oral cavity, it is funnel-shaped, having 

 three openings at the back, one of which connects directly 

 with the oesophagus, while the others appear to connect with 

 the water vessels. 



The intestine is long and contains some pigment granules, 

 arranged in dentritic forms, throughout its length ; the whole 

 is thrown into convolutions, and gives an almost black ap- 

 pearance to the worm, except when the white oviducts dis- 

 tended with eggs, or the seminal vessels of the male are 

 folded over the intestine, when it has a white, mottled 

 appearance. 



The caudal extremity of the female is spindle-shaped, but 

 has two little bursse higher up. In the male it is formed by 

 three-lobed bursas, above which are two well developed flexi- 

 ble spicula." 



*It is quite as probable that they may hatch in water, and thus enter the hog's 

 stomach with its drink. — v. 



