ANTHOZOA—TETRACORALLA. 77 



63. L. mamillare E. & H. (Fig. 120.) Lower Carbonic. 



Prismatic corallites, with moderately deep calices marked by the 

 conical elevation which is carinated by the septa and terminates in 

 a compressed pseudo-columella. 



In the lower Carbonic (St. Louis) limestone of Michigan, the 

 Mississippi Valley and Southern Appalachians generally. 



Fig. 120. Lithostrotion mamillare (Ind. Geol. Survey). 



XXXIX. Calceola Lamarck. 

 Coral simple with one side flattened and a deep calyx opening 

 obliquely and furnished with an operculum ; septa in the form of 

 low ridges. Structure densely cystoid. Sil.-Carb. 



64. C. tenneseenensis Rom. (Fig. 121.) Siluric. 



Strongly curved, with a high arched operculum and interior 

 largely occupied by vesicular tissue. 



In the upper Niagara beds of Tennessee. 



