314 



in length. Those in the digits are of the same shape (Fig. 67. 4), 

 but they are much smaller, not measuring more than 80 — 100 ^. 



Fig. 67. 1—8 Tœniogyrus keiensis, 9—16 Tœniogyrus australianus. 1 madreporite 

 x 36. 2 pieces of calcareous ring X 24. 3 ciliated funnels X 55. 4 tentacle- 

 rods X 160. 5—6 sigmoid bodies X 160. 7—8 inrolled ends of sigmoid bodies 

 X 550. 9 pieces of calcareous ring X 24. 10-11 sigmoid bodies X 160. 12—13 

 inrolled end of sigmoid bodies X 550. 14 tentacle-rods X 160. 15 madreporite 

 X 36. 16 ciliated funnels X 36. 



Tœniogyrus keiensis is an easily recognizable species, which is 

 the most closely related to T. cidaridis Ohshima. It is characterized 



