80 MCMURRICAH. 
DESCRIPTION OF PLATE IV. 
Fic. 1. Portion of transverse section through a mesentery of Discosoma anemone. 
X 59- 
Fic. 2. Portion of tangential section through disc and column of Rhodactis Sancti 
Thome, just below the bases of the marginal tentacles. ex= endoderm of column; 
en' = endoderm of disc; ec= ectoderm of disc; ~e= large nematocyst in endoderm. 
<H23 
Fic. 3. Portion of transverse section through the stomodzum of Rhodactis Sanctt 
Thome. X45. 
Fic. 4. Portion of transverse section through the body wall of Heteranthus flort- 
dus. X 44. 
Fic. 5. Longitudinal section through a disc tentacle of Heteranthus floridus. 
X 64. 
Fic. 6. Transverse section through a verruca of Phymanthus crucifer. py = pyri- 
form cells (nerve cells?). XX 50. 
Fic. 7. Longitudinal section through the upper portion of the column wall of 
Phymanthus crucifer. X50. 
Fic. 8. Transverse section through a tentacle of Phymanthus crucifer. mgl= thick- 
ened mesoglcea. X 16. 
Fic. 9. Portions of transverse section through a mesentery of Phymanthus cru- 
cifer: a, near its base; 4, near its middle. X 35. 
Fic. 10. Transverse section through gonophoric region of a mesentery of Phy- 
manthus crucifer. te= testis; f:=filamental apparatus. X 250. 
Fic. 11. Longitudinal section through a disc tentacle of Phymanthus crucifer. 
X 100. 
Fic. 12. Portion of longitudinal section of column wall of Oudactis flosculifera, to 
show elevation of the mesogloea. X 56. 
FIG. 13. Portion of transverse section of a tentacle of Oxlactis flosculifera. X72. 
Fic. 14. Transverse section through the gonidial groove of the stomodzum of 
Oulactis flosculifera. X25. 
Fic. 15. Portion of transverse section through the column wall of Zoanthus soct- 
atus. cu=cuticle; emc = endodermal canal in mesoglcea. X 265. 
Fic. 16. Transverse section of stolon of Zoanthus sociatus. X 30. 
Fic. 17. Transverse section of basal portion of macroseptum of Zoanthus sociatus. 
bc = basal canal. 
Fic. 18. Transverse section of stomodeum of Zoanthus sociatus. X 33. 
Fic. 19. Longitudinal section through margin and upper part of column wall of 
Gemmaria isolata, showing the sphincter muscle.  X 25. 
Fic. 20. Transverse section of the stomodzeum of Gemmaria isolata. X 27. 
Fic. 21, Radial section of disc of Gemmaria isolata. 
