504 w. BLAXLAND BENHAM. 



Fig. 11. — A diagrammatic transverse section through the genital region 

 in the region of the single pair of " intestino-tegumentary canals" (b) 

 (compiled for a series of outline drawings), (a) Intestine, (b) " Canal." 

 (c) Its pore, (d) Gonad, (e) Ventral blood-vessel, (f) Ventral nerve. 

 (g) Ventral groove, (h) Dorsal nerve, (i) Dorsal blood-vessel. 



Fig. 12. — Sketch of anterior part of the body of the small specimen, stained 

 and mounted entire, to show the position of the single pair of intestino- 

 tegumentary canals (f). (a) Collar, (b) Branchial region, (c), (d) Intestine 

 in genital region, (e) Post-genital intestine. 



