412 THE AMERICAN NATURALIST. 
EXPLANATION OF PLATE III. 
Fics. 1-5. Show a phase of "tif not uncommon, in aei after the first 
division, the blastomeres segment in a perfectly independent w 
F Show the final csi of the two portions, pe^ in Fig. 8, the 
resulting morula, which gradually assumes the planula form of Fig. 7 of Pl. I. 
The figures of this series are somewhat diagrammatic. 
Fic. 9. Young polyp phase soon after attachment. 
Fic. 10. Polyp with budding tentacles, 7. 
Fic. 11. Fully grown polyp, with full vim gaa s tentacles, mouth, annu- 
lation of perisarc, etc. Sketched from life, with cam 
