242 Freda Bage : 



c. t. Connective tissue 



Q t. 1. Connective tissue between blocks of longitudinal 



muscle 



cut. Cuticle covering epidermis 



cub. epi. Cubic epithelial cells 



(^1. c. Duct connecting doisal and ventral meganephridia 



d. i. Intracellular duct leading from the funnel 

 epi. Epidermis 



F. Funnel 



g. c. Goblet cells 



i. c. Cells lining intracellular duct 



i. d. Lumen of intracellular duct 



in. Muscles 



m. c. Mass of cells round preseptal portion of intracel- 



lular duct 



m. circ. Circular muscles cut in section 



n). d. Marginal duct passing round bladder and con- 



nective tissue 



m. long. Longitudinal muscles cut in section 



M. S. Muscles forming sphincter 



N. Meganephiidia 



N\ Large nephridium with no funnel, but connected 



with the anterior septum 



N. C. Nerve cord 



N. D. Dorsal meganephridia 



N. d. Duct fi-om meganephridium to sinus between 



longitudinal and circular muscles 



N. V. Ventral meganephridia 



n., n}, n.'^, n.'' Micronephridia 



n. c. 1. Network of nephridial ducts between circular 



and longitudinal muscles 



n^ d. Duct from 1st micronephridium to sinus between 



longitudinal and circular muscles 



n-. d. Duct from 2nd micronephridium to sinus between 



longitudinal and circular muscles 



n."' d. Duct from 3rd micronephridium to sinus between 



longitudinal and circular muscles 



neph. Nephridia 



