566 



Report of the State Geologist. 



Ckepipora, Illrich. 



(Geol. Sur. III., Yol. YII, p. 40i. 1890.) 



Type, Crepipora simulans, TJlrich. 



lacrasting, lamellate or massive from the superimposition of 

 successive layers of growth; cells slightly oblique; pseudoseptal ; 

 apertures rhomboidal or pyriform ; lunarium prominent ; surface 

 exhibiting at irregular intervals minutely porous or subsolid 

 elevations or depressions ; mesopores usually restricted to the 

 maculae. 





Fig. 133, Crepipora simulans . A frond, natural size. 



Fig. 134, A portion of the surface, xl2. 



Fig. 135. C. impressa. A frond, natural size. 



Fig. 136. A portion of the surface, xl2. 



DlAMESOPOBA, Hall. 



(Pal. K Y., Yol. II, p. 158. 1852.) 

 Type, Diamesopora dichotoma, Hall. 



(Plate 16, figs. 3-5.) 

 Zoarium ramose, hollow ; thickness of frond about .33 mm. 

 Inner surface composed of an epitheca, marked by strong con- 

 centric undulations of growth, fine concentric striations and fine 

 longitudinal striae, caused by the recumbent portion of the cell 



