98 



COELENTERATA— ANTHOZOA 



PHYLUM II 



circular contour and assume the form of protruded lips. Jurassic and 

 Cretaceous. 



Astrangia, Cryptangia, PhyUangia, Cladangia (Fig. 141), Ulangia E. and H., 

 etc. Tertiary and Recent. 



€. Massive coralla muUiplying hy lateral gemmation. 



Orbicella Dana (Fig. 142). Cylindrical corallites united by exothecally 

 produced, confluent, costal septa. Columella spongy ; dissepiments numerous 

 between the septa both. within and exterior to the theca. Jurassic to Recent. 



Plesiastraea From. Like the preceding, but with several pali in front of 

 all the cycles excepting the last. Tertiary and Recent. 



Fig. 143. 



Isastrea helianthoides (Goldf.). 

 Coral-Rag ; Nattheim, Swabia. 

 Natural size. 



Fig. 145. 



Favia caryophylloidcs 

 From. Coral-Rag; Natt- 

 heim. Natural size. 



Fig. 142. 



OrMcella conoidea (Reuss.). Mio- 

 cene; Enzesfeld, near Vienna. a, 

 Corallum, natural size ; b, Calices 

 enlarged. 



Fig. 144. 



Latomeandra seriata 

 Beck. Coral-Rag; Natt- 

 heim. Natural size (after 

 Becker), 



Fig. 146. 



CalamopJiyllia stokesi E. and H. 

 Coral-Rag ; Steeple Ashton, England. 

 Natural size. 



Isastrea E. and H. (Fig. 143). Corallites prismatic, closely crowded, and 

 with fused walls. Calices polygonal ; columella imperf ect or absent. Trias 

 to Cretaceous. 



Latortuandra d'Orb. (Fig. 144). Like the preceding, but with the calices 

 situated in short furrows. Trias to Cretaceous. 



Stylastraea From. Lias ; Europe. Amphiastraea From. Upper Jurassic ; 

 Europe. Leptastrea, Solenastrea, Prionastrea, E. and H. etc. Tertiary and 

 Recent. 



{■. Massive coralla multiplying hy fission. 

 Favia Oken (Fig. 145). Corallum massive; calices oval or distorted, and 

 united by confluent costal septa ; columella spongy. Jurassic to Recent.' 



