INDIANA PALEONTOLOGY. 46. 



meters. Exterior with a strong epithecal crust, with numerous fine longitudi- 

 nal strise, and shallow constrictions, and wrinkles, caused by periodical 

 growth. In decorticated examples, they exhibit numerous shallow oblong 

 cysts, occasionally, having traces of fine striae, in the concave spaces. Calix 

 very broad, oblique, varying in different individuals, from twenty to forty 

 millimeters in diameter, near the margin of the cup, there is a few vesicles, but 

 the bottom of the calix is perfectly smooth, the corallum appears to be composed 

 of thin invaginated cups. 



Found in the middle Devonian (upper Helderberg group), Falls of the Ohio. 

 Now in the collection of the author. 



CYSTIPHYLLUM DIVERSUM. N. Sp. 



Plate 17. Figs. 9-10. 



Corallum simple turbinate, straight or regularly curved, with a broad scar 

 at the base of attachment. Gradually expanding in diameter to the calix. 

 Height twenty-five millimeters. Calix broad, oblique, with spreading margins 

 forty millimeters in diameter. Depth twenty millimeters. The bottom of the 

 calix, is covered with numerous vesicles, larger than those on the sides, and 

 near the margin of the cup. There is numerous, rather coarse Septa, 

 that seems to interfere with the vesicles, and the two blend together, 

 giving to the calix, a peculiar rugose appearance. Exterior when decorticated, 

 exhibits numerous somewhat coarse vesicles, a few shallow constrictions, and 

 wrinkles, caused by periodical growth. 



Found in the upper Devonian (Hamilton group) near Charlestown, Indiana. 

 Now in the collection of the author. 



BLOTHROPHYLLUM CONIFERUM. N. Sp. 



Plate 16. Figs. 2-3-4-5-6. 



Corallum simple, elongate turbinate, orconico-cylindrieal, straight or grad- 

 ually or sometimes irregularly curved.' Acute at the base of attachment, in 

 some examples there is short root like processes near the base which served 

 as attachments to some foreign objects for support. Gradually, or at times 

 more rapidly expanding in diameter to the calix. Height varying in different 

 individuals, from thirty to one hundred millimeters or more. Calix broad, bell- 

 shaped, thirty millimeters in diameter. Depth twenty-five millimeters. A con- 

 vex space in the bottom of the calix occupied by the tabulae twelve millimeters 



