The Histogenesis of Cysticercus pisiformis. 251 



Explanation of plates. 



All drawings were outlined by the Bausch & LOMB camera lucida, 

 and details added with the same magnification. The magnifications given 

 are approximate. 



h basement membrane 



I', c' capillaries 



ca chalk body 



cc, cc' capillary cells 



cc a cell of chalk body 



ct thickening of capillary 



cu cuticula 



ß wall of excretory duct 



f flame cell 



k hook 



li' primitive hook 



lie cavity of hook 



im inner sub-cuticular muscle layer 



le lumen of excretory duct 



Inc main lateral nerve cord 



III muscle 



mcjj mass of cytogenic protoplasm 



inf mass of cytogenic protoplasm giving rise to flame cells 



lib neuroblast 



Hill neuro- muscular cell 



oc opening of capillary 



om outer sub-cuticular muscle layer 



pc parenchyma cell 



pee parenchyma cell of excretory duct wall 



pnc peripheral nei've cord 



po outer parenchyma layer in which cuticula is developing 



sc, sCx sub-cuticular cells 



