78 PALEONTOLOGY OF ILLINOIS. 



Position and locality: This little coral is common in the 

 Warsaw beds at Spergen Hill, Indiana, and at Warsaw, 111. 

 Collector, A. H. Worthen. 

 No. 2574 of the Illinois State Museum. 



ZAPHRENTIS VAKSOVIENSIS. (sp. nov.) 



PL X. Figs. 9-9a. 



Corallum small, turbinate, pointed below, and slightly curved; 

 epitheca thin, external stria? distinct ; height of corallum 1 inch; 

 breadth of cup, 7 /ie inch; depth of the same, % inch. 



Septal fossette nearly central, and extended on the side of 

 greatest curvature; primary lamellae comparatively strong, and 

 numbering about twenty-six, all reaching the thickened border 

 of this septal fossette. 



Position and locality: This symmetrical little species is quite 

 common in the Keokuk limestone, at Warsaw, Hamilton, Nnu- 

 voo and Keokuk. 



Collector, A. H. Worthen. 



No. 2557 of the Illinois State Museum. 



ZAPHRENTIS CYLINDRACEUS. (sp. nov.) 



PL IX, Figs. 5-5a. 



Corallum long, cylindrical, slightly curved, tapering at the 

 lower extremity. Surface marked by numerous transverse un- 

 dulations and fine longitudinal striae. Cup shallow', the center 

 slightly elevated as in the genus Anisophyllum. Septal fossetle 

 situated on the side of least curvature, and not reaching to the 

 center of the cup. Lamellae about thirty-two to thirty-four, 

 which coalesce in several groups before reaching the central 

 elevation. 



Length, 2% inches; breadth of cup % inch. 



Position and locality: Chester limestone, Chester, 111. 



Collector, A. H. Worthen. 



No. 2561 of the Illinois State Museum. 



ZAPHRENTIS REVERSA. (sp. nov.) 



Coral very broadly turbinate, the length being but little more 

 than the breadth of the cup; moderately curved, epitheca thin 

 and interspersed with numerous rather stout spiniform points, 



