ioo 



NORTH AMERICAN INDEX FOSSILS. 



132. P. coalescens Roem. Cretacic. 



Slender cylindrical, much branching corals with calices 3 mm. in 

 diameter — septa not reaching to center, which is occupied by 

 spongy columella. 



In the Edwards limestone (Lower Cretacic) of Texas. 



Fig. 161. Parasmylia texana (Vaughan, Bull. U. S. G. S. ). 



LI. Cladophyllia E. & H. 



Branching corals with cylindrical stems multiplying by fission. 

 Calices circular with a rudimentary columella or none; a well-de- 

 veloped epitheca is present. Cret.-Recent. 



133. C. furcifera Roem. (Fig. 162.) Cretacic. 



Calices 4 to 6 mm. in diameter. No columella, septa in 3 cycles. 

 Growth a regular forking, with uniform 

 branches. Epitheca concentrically wrinkled. 



In the Edwards limestone (Lower Cretacic) 

 of Texas. 



Fig. 162. Cladophyl- 

 lia furcijera, section of 

 calyx, X 2 - 



LII. Septastr/ea d'Orbigny. 

 Compound corals, with corallites pris- 

 matic from crowding. Calices of moderate depth with simple septa 



Fig. 163. Septastra?a marvlandica (Md. Geol. Surv. ) reduced. 



