70 



BOARD OP AGEICULTURE. 



tinct joints. These are at first very small and short, gradually 

 becoming broader and squarish, then oblong. The largest 

 are about a third of an inch in breadth and quite thin and flat 

 (Figure 52). The sexually mature joints or proglottides are 

 twice as long as broad, and contain the ovaries and a long 

 central egg cavity or uterus, with 7 to 12 lateral branches, 

 which are irregularly lobed and divided (Figure 54.') ; and also 

 the male organ, or testicle, in the form of branched tubes, 

 communicating with a penis, which is situated on one edge 

 of the joint, in front of the female genital orifice, and has a 

 curved or sickle-shaped form. The genital openings are either 

 on the right or left edge indifferently, in the successive joints. 



Figure 49. Figure 52. 



The young or larval state produces the white spots known as 



Figure 49. — Pork " measles" ; natural size ; Hearth and Home, after Ovv-en; 



Figure 50. — Young tapeworm from measles of pork; and Fig. 51, head of same, 

 more enlarged ; Hearth and Home, after Owen. 



Figure 52. — Pork tape-worm (Tccnia soHum). less than natural size; Hearth and 

 Home, after Owen. 



