PLATE 36. 



Figs. 22, 23. Gyrocotyle fimbriata, anterior extremity, ventral and 

 dorsal. Showing sensory pits and arrangement of spines. From pre- 

 served specimen. X 13. 



Fig. 24. G. urna (var.). Sketch from life. Lateral view, expanded. 

 Showing spines, lateral fold and posterior rosette. 



Fig. 25. G. fimbriata. Dorsal half of sagittal section of tip of aceta- 

 bulum, showing sensory pit. Borax-carmine, Lyon 's blue. X 430. 



Fig. 26. G. fimbriata. Sketch, life, acetabular extremity. Showing 

 anterior excretory ring and deeper-lying ciliated canals. 



Fig. 27. G. fimbriata. Sagittal section just laterad of the acetabulum. 

 Showing anterior longitudinal nerve stem, with branches and anterior 

 ganglionic knot. No histological detail; position of giant-cells within 

 ganglion knot marked by small circles. 



acet. op. acetabular opening. 



ant. ex. r. anterior excretory ring. 



ant. gang. Jen. anterior ganglion knot. 



ant. lat. n. st. anterior lateral nerve stem. 



cil. cilia. 



cut. cuticula. 



ex. can. excretory canal. 



gen. notch genital notch. 



lat. /.lateral fold. 



par. nuc. parenchyma nucleus. 



p. op. penis opening. 



post. ros. posterior rosette. 



sens, pit sensory pit. 



sp. spine. 



test. testis. 



ut. po. uterine pore. 



test. n. testicular nerve. 



[444] 



