317 



Fig. 68. Tœniogyrus cidaridis 1—9 and Tœniogyrus clauus 10—16. 1 abnormal 

 wheel X 550. 2 ciliated funnels x 36. 3 madreporite x 36. 4—5 sigmoid 

 bodies X 160. 6—7 inrolled ends of sigmoid bodies X 550. 8 pieces of cal- 

 careous ring X 24. 9 tentacle-rods x 160. 10 tentacle-rods x 160. 11—12 sig- 

 moid bodies X 160. 13—14 inrolled ends of sigmoid bodies X 550. 15 pieces 

 of calcareous ring x 24. 16 madreporite x 36. 



