458 



MESOZOIC TIME — REPTILIAN AGE. 



3. Radiates. — (a.) Corals. — Fig. 718, Montlivaltia caryophyllata, from the 

 Bath Oolite; fig. 719, Prionastrea oblonga, Lower Oolite. Anabacia Orbulitea 

 is a disk-shape coral of the Fungia family, from the Lower and Middle Oolite. 



Figs. 717-719. 



Sponge.— Fig. 717, Scyphia reticulata. Polyp-Corals.— Fig. 718, Montlivaltia caryophyllata; 

 719, Prionastraea oblonga. 



(b.) Echinoderms. — Fig. 720, Apiocrinus Royssianus, from the Coral limestone, 

 — only the top and lower part of the stem given. Fig. 721, Saccocoma pectinata, 



Figs. 720-722. 



Echinoderms.— Fig. 720, Apiocrinus Royssianus (X/4); 721, Saccocoma pectinata; 722, 

 722 a, Cidaris Blumenbachii. 



Star-fish related to Comatula, from the Middle Oolite; fig. 722, Cidaris Blumen- 

 bachii; fig. 722 a, spine of same. 



