152 



ZOOLOGY 



B 



FIG. 141. Trichina. A, encysted form in muscle of pork; B, female; 

 (', male; bh, envelope of cyst; cy, cyst; de, male duct; e, embryos; /, fat 

 globules; h, testis ; mf, muscle fibre; oe, pharynx; ov, ovary; no, opening 

 to egg duct; zh, cell masses in intestines. After Clans. 



