I KH'HK 4. STKXOSTO.M A IKIlOl'S (AFTKK OTT). 



c., cilia, c.p., ciliated pits, cu., cutieula. 



FIGURE 4 



b., brain, com., brain 



commissure. <!.<>., dish-shaped organs, m., mouth, ph., pharynx 

 ph.e., pliarvngeal cells, c.c., epithelial cells, in., intestine, w.v.t., 

 water vascular tube, r., rods, p., parenchyme. o.w., external open- 

 inir <if water vascular tube. 



<;riu: I5. STY i. ON vi n IA MYTH. is (FIIOM iiAirnx;, AITKII IAXG). 



a.c., abdominal cirrhi. an., anus discharging the shell of a Diatom. 

 c.c., caudal cirrhi. c.p., dorsal cirrhi. cv., contractile vacuole. e., 

 part of its replenishing canal, f.c., frontal cirrhi. f.v., food vac- 

 uoles. jr., internal undulating membrane. 1., lip. m., mouth or 

 pharynx, inc., marginal cirrhi. \., X., lobes of meiianucleus. n, n, 

 micronuclei. o., anterior end. per., adoral membranellae. poc., 

 preoral cilia, p.om., preoral undulating inenibraiu 1 . s.h., sense hairs. 



233 



