Plate 31. 



Olindias singularis. 



Fig. 1. General view, x 2. 



Fig. 2. Aboral view of the same specimen, showing the blind centripetal canals. 



Fig. 3. Side view of a portion of the margin, showing the position of the otocysts (oc) at 

 the bases of the primary (exumbrella) tentacles (t.ex). x 8. 



Fig. 4. A portion of the bell margin; (t.ex) primary tentacles ;«-(tv) secondary (velar) 

 tentacles ; (t.b) tentacular bulbs. At the base of each primary tentacle there 

 are either one or two otocysts. X 6. 



Fig. 5. A portion of the same, more enlarged. 



Fig. 6. Manubrium, showing the complexly folded lips, x 4. 



Fig. 7. Tip of a secondary (velar) tentacle, with terminal nematocyst knob. 



Fig. 8. Tip of a primary tentacle ; (s) sucking disc. 



Fig. 9. A portion of a secondary tentacle, to show arrangement and extent of nematocyst 

 bands. 



Fig. 10. Base of a primary tentacle with two otocysts ; (oc) otocyst ; (ot) otolith ; (t) ten- 

 tacle. In one otocyst there is one; in tlie other, there are two otoliths, x 25. 



