PLATE LXIII. 



LETTERING ADOPTED IN THE FIGURES. 



?«., . . 

 mes. can., 

 m. sph. m. 

 nem., . 

 ces., 

 s. d., 

 s. gr., 

 si. d., 

 vert. can. 



mesogloea. 



mesenterial canal. 



mesoglceal sphincter muscle. 



nematocyst. 



tesophagus. 



sulcar directive mesenteries. 



sulcar groove. 



sulcular directive mesenteries. 



vertical canal. 



zooxantheUa. 



Fig. 



1. Zoanthus juJcesii, n. sp. (p. 678). Transverse section through the oesophageal region of the 

 4 



column 



' „* 



a* 10 



3. Zoanthus macgilUvratji, n. sp. (p. 680). Transverse section through the lower portion of the 



column, — ^ 



a* 8 



2 

 3. Isaurus tubercuhtus (Grray), (p. 617 of Bbitish Zoanthe^). Section through an ectodermal bay, — . 



2 



4. Isaurus asymmetricus, n. sp. (p. 684). Vertical section through a sphincter muscle, ^ . 



5. Isaurus asymmetricus. Transverse section through a portion of the centre of the base of the 

 2 



column, 



D' 



6. Isaurus asymmetricus. Transverse section through the periphery of the body-wall, j-. 



7. Gemmmia macmurrichi, n. sp. (p. 688). Transverse section through the body-wall (decalcified), 



B' 



8. Palythoa howesii, n. sp. (p. 693). Transverse section through the body-wall (decalcified), ■=-. 



2 



9. Palythoa kochii, n. sp, (p. 694). Transverse section through the body-wall, -^. 



