PLATE 36. 



Figs. 22, 23. Gyroeotyle 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. hn. — anterior ganglion knot. 



ant. int. n. st. — anterior lateral nerve stem. 



cil. — cilia. 



cut. — cuticula. 



ex. can. — excretory canal. 



gen. notch — genital notch. 



hit. f. — lateral fold. 



par. nuc. — parenchyma nucleus. 



p. op. — penis opening. 



post. ros. — posterior rosette. 



si us. pit — sensory pit. 



sp. — spine. 



lest. — testis. 



vt. po. — uterine pore. 



test. a. — testicular nerve. 



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