HEXACTINI^ FKOM NEW SOUTH WALES. 57 



Fig. 12. Phellia browni. Transverse section through a tentacle, x 282. 

 Shows large development of ectodermal muscle. 



13. Phellia browni. The polyp was cut in two transversely through the oesophageal 



region. This figure represents the lower half viewed as a solid object. Drawn 

 under a dissecting microscope, x 12. 



14. Phellia capitata. x 3. 



Plate 6. 



Fig. 15. Phellia capitata. Longitudinal section tlirough sphincter and tentacles. X 44. 



16. Phellia capitata. Longitudinal retractor muscle in sitic. The everted oesophagus 



has been cut open longitudinally, and the gonads and muscles are exposed to 

 view. Drawn under a dissecting microscope. 



17. Phellia capitata. Transverse section showing examples of the three cycles of 



mesenteries. X 52. 



18. Phellia capitata. Transverse section through enlarged heads of two longitudinal 



retractor muscles, x 52. 



19. Phellia capitata. Longitudinal section through oesophagus, disc tentacles, and 



muscle-head of retractor muscle, x 34. 



LINN. JOURN. — ZOOLOGY, VOL. XXXIl. 



