INDIANA PALEONTOLOGY. 68, 



BLOTHROPHYLLUM GREENEI, N. Sp. (Rowley.) 



Plate 23. Figs. 16-17-18-19-20. 



This coral is extremely variable in form, sometimes elongate like Amplexus 

 and at other times short like Zaphrentis, all the specimens being more or less 

 tortuous. 



The calix apparently not very deep but the rim is partly broken away in 

 all the specimens examined. 



The primary septa are very thin and do not reach the center, a portion of 

 the uppermost tabulum appearing at the bottom of the oblique cup. A deep 

 septal fossette is near one side at the bottom of the calix. 



Secondary lamellse occur as mere denticulations near the top of the cup 

 rim. One calix is somewhat elliptical while another is quite round, conform- 

 ing in general to the tortuous or irregular growth of the coral stem. There are, 

 probably, not far from fifty primary lamella?, but in the two specimens showing 

 the calix they are greatly broken up in places, owing to their thinness. 



The tabular extend throughout the length of the corallum, perhaps, and are 

 seen along the side of broken and weather worn specimens, being slightly con- 

 cave on the upper middle portion. 



The blister-like plates of the outer zone are also to be seen on decorticated 

 specimens. 



The epithica is thin and through it may be seen the longitudinal striations 

 corresponding to the septa. 



Lines of growth are present. 



One specimen only is entire at the base and is pointed, with a scar of at- 

 tachment just above the twisted point as if the coral had actually half sur- 

 rounded the stem of some object to which it had been attached. 



Many of the specimens display numerous crowded lines of growth. 



This interesting coral is named specifically for the collector, Mr. George K. 

 Greene, of New Albany, Ind., in whose collection the specimens now are. 



This species occurs one and one half miles east of Bridgeport, Clark county, 

 Ind., in the Knobstone group. 



SPIRIFER LATERALIS, Var. DELICATUS. N, Var. (Rowley) 



Plate 23. Figs. 21, 22-23. 



The several specimen's of this shell difi'er much from Hall's figures and de- 

 scriptions of Spirifer Lateralis. They are much smaller and have very much 



