136 



WORMS. 



Vl-subint 



Fig. 90.— The first twelve segments of rolyopMhalmus pictus, seen from below (after 

 Mayer). The Roman numerals indicate the segments. St, Papillaj on the head ; 

 KS, head; ait, head eye; s.au, side eyes; 01, upper lip; Ul, under lip; ujjA 

 pharyngeal vein ; V.subinta, anterior ventral vein ; V.d.l'-\ veins connecting the 

 superior lateral and vessels ; sepV-^, intersegmentary membranes ; m.ocs.l, lateral 

 muscle of the oesophagus ; V.ann, pulsating circular vessel ; Md.dr, stomach- 

 glands ; V.v-l, vein connecting the inferior and lateral blood-vessels ; Md, stomach ; 

 Bm, muscles of the hairs ; G, brain ; ji.o, ciliated organ ; qm, transverse muscle. 



