HOW T0:MITE IMANUFACTURES TRICHOCYSTS 23 



A 







.^/.:-^ 







\ i ■/ : 





tt:g ? 



9l| ;f 8 . 7 : 



/?2 



'S iff -^ / 



Fig. 9. Polyspira delagei. (a) Last division, (b), (c), (d) Tomito- 



genesis. Formation of the ogival field {ch.og.) from a. Disappearance 



of h and c. c.j., "falciform," thigmotactic, field. 



