70 



rigin of sonse-organ, S.C., showing endodex-mal 

 origin; Caps, sensory capsule, surrounded, by ecto- 

 derm; V veliim. 



Fig, 31. Tentacle tip of larva from above. End, single 

 chain of endodermal cells; On, cnidocil; G.C, 

 ganglion cell. 500/l. 



Fig. '62, Nematocyst in detail, shoviing cnidocil, Cn. , gan- 

 glion cell, Ci.C, nerve fibres, N.F. running to- 

 wards distal end. 2000/1, 



Fig. 33, Ectodermal pad at base of tentacle. Three areas 



of cell secretion, C.P. cartilaginous pad, T, ten- 

 tacle, M. mesogloea; Radial vortical section. 



Pig, 34, Transverse section, at bell margin, of base of 

 tentacle, showing tentacle pad, C,P, 



