80 PALAEONTOLOGY OF ILLINOIS. 



lamellae about fifty, each alternate one comparatively robust, 

 and extending to the bottom of the calice, while the others 

 become obsolete before reaching the bottom. 



Length of an average size specimen % inch; breadth of calice 

 / 10 ; depth of the same 7 /i inch. 



Position and locality: Coal measures. Lower division of the 

 LaSalle limestone, LaSalle, 111. 



Collector, A. H. Worthen. 



No. 2565 of the Illinois State Museum. 



GENUS ANISOPHYLLUM. Edwards & Haime. 

 ANISOPHYLLUM? IOVAENSIS. (sp. iiov.) 



PL IX, Fig. 7. 



Corallum rather narrowly turbinate, slightly curved and 

 pointed at the extremity. Central node prominent. No clearly 

 defined septal fossett can be seen. 



Lamellae about thirty, three of which are elevated above the 

 bottom of the cup, dividing it in four unequal divisions. 



Height 1% inches ; width of cup % inch ; depth of the same % inch. 



I am not aware that any examples of the above named genus 

 have hitherto been found in carboniferous strata, and hence 

 refer the above described species to Anisophyllum with some 

 doubt. It seems to be clearly distinct from Zaphrentis, and its 

 affinities seem to be with the above named genus. In some 

 respects it resembles the species described under the name 

 Zaphrentis cylindraceus, from the Chester limestone, but differs 

 from that in its shorter form, more elevated central node, and 

 in the possession of three elevated lamellae. 



Position and locality. Calcareous shales of the St. Louis 

 limestone, Pella, Iowa. 

 Collector, A. H. Worthen. 

 No. 2568 of the Illinois State Museum. 



