30 
Fig. 21.— ZOANTIIARIA RUGOSA. (Cyathaphylloida.) 
<i o 
Fig. 21: m, Zaphrentis gigantea; i, Z. Rafinesquii ; Ileliophyllum Halli; it, Phillips- 
astrea Verneuili; e, Cyathophyllum rugosum. 
The Cjathophylloid corals, or cup-corals, may he found under 
nearly all the epochs above the Chazy, being most abundantly 
represented under the Upper Helclerberg, in Cases G, Sect. 10, 
and h, Sect, i ; under the Hamilton, Case i, Sects, i and 2, and in 
the Burlington and Keokuk limestones, Case M, Sects, n and 13. 
Fig. 22.— ZOANTIIARIA ASTEROID A Star Corals.) 
c 
Fig. 22: a and Fndopachys Maelurii, the last an enlarged top view ; c y Montivaltiacaryo- 
phyllata. 
