PLATE 42. 



Fig. 55. Gyrocotyle fimbriata. Transverse section, showing cuticula 

 and cuticular musculature. Iron haematoxylin. X 1500. 



Fig. 56. Showing structure of muscle fibres of the inner circular and 

 inner longitudinal layers. X 1850. 



Fig. 57. Showing sagittal (upper) and outer transverse (lower) 

 muscle cells. X 1850. 



Fig. 58. Frontal section of cuticula and cuticular musculature. Cut 

 through a fold of body-covering, in the plane of the fibres of the cuticu- 

 lar musculature. X 1850. 



Fig. 59. Showing wall of receptaculum seminis, and undifferentiated 

 nucleated muscle fibres lying in the parenchyma of which it is composed. 

 X 1850. 



cut. cuticula. 



cut. long. cuticular longitudinal muscle. 



cut. trans. cuticular transverse muscle. 



ext. cut. 1. external cuticular layer. 



in. long. fib. inner longitudinal fibre. 



in. trans. inner transverse muscle. 



in. trans, fib. inner transverse fibre. 



nuc. nucleus. 



out. long. outer longitudinal muscle. 



out. trans. outer transverse muscle. 



out. trans, fib. outer transverse fibre. 



par. felt parenchyma felt. 



par. nu. parenchyma nucleus. 



sag. fib. sagittal fibre. 



sub. cut. subcuticula. 



undif. muse. fib. undifferentiated muscle fibre. 



vit. vitellaria. 



[456] 



