Clisetoptenis Variopedatiis. 531 



REFERENCE LETTERS FOR FIGURES, 

 ae. M. org., jKcessory feeding-organ. 

 ad. d., adhesive disc, 

 al. not., aliform notopodiuni. 

 an., anus. 



oil. 2, second ciliary girdle, 

 cil. 3. third ciliary girdle, 

 cil. gr., ciliary groove, 

 dr., cirrus. 



dors, div., dorsal diverticulum. 

 D. v., dorsal vessel, 

 fl., flagellum. 

 gl., gland-cell, 

 hft, holdfast, 

 int.. intestine. 



int. neur., internal neuropodium. 

 1. ey.. lateral eye. 

 med. ey., median eye. 

 nith.. mouth, 

 neph., nephridium. 

 neur., neuropodium. 



( int. lb., internal lobe of neuropodium. 

 \ ext. lb., external lobe of neiu'opodium. 

 ov., ova. 

 ovy., ovary, 

 pal., palettes, 

 pi., plastron. 



p. o. 1., post-oral lobe or lip. 

 pr. o. 1., pre-oral lobe or lip. 

 set., seta, 

 tt.. tentacle, 

 unc. pi., unciual plates, 

 vent. nv.. ventral nerve. 

 V. mus.. ventral muscle 

 V. v.. ventral vessel. 



XII, XIII, XIV, XV, XVI. .l.'si-iiatc the names of the segments of the 

 middle region of the worm. 



