INDIANA PALEONTOLOGY. 30 



CYSTIPHYLLUM OSCULUM, N. Sp. 



Plate 10. Figs. 6-7-8. 



Corallum simple, turbinate, or subturbinate. Graduallj" or sometimes ir- 

 regularly curved. Acute at the bsse of attachment, gradually enlarging to the 

 calix. Height varying in different individuals, from forty-five to sixty milli- 

 meters. Calix funnel-shaped, fifteen millimeters in diameter. Depth fifteen 

 millimeters; sides regularly sloping to the bottom of the cup. A few rounded 

 lamelh^ appear near the margin of the calix, but rarely extend to the bottom of 

 the calix. The vesicles in the calix appear as irregular swellings, giving to 

 the calix a somewhat undulating appearance. , Exterior with few distant shal- 

 low annulations and wrinkles; when dicorticated the suriace is covered with 

 numerous fine cysts. 



Found in the upper Devonian (Hamilton group), near Charlestown, and at 

 the different cement quarries throughout Clark county, Indiana. Now in the 

 collection of the author. 



CYSTIPHYLLUM C O N S T R I C T U M, N. Sp. 



Plate 10. Figs. 9-10-11-12. 



Corallum simple, turbinate or subturbinate, straight or irregularly curved. 

 Acute at the base, or in some examples there is a broad scar at the base of at- 

 tachment. Height varying in different individuals, from forty to seventy 

 millimeters; slightly enlarging towards the calix. Exterior with a thick, 

 smooth epithical crust, and strong rounded, irregular annulations. and deep 

 constrictions, caused by intermittent growth. Calix shallow, oblique, twenty- 

 five millimeters in diameter. Depth from five, to fifteen millimeters. There 

 are numerous fine lamellfe near the margin of the calix, that extend five or ten 

 millimeters from the margin of the cup, and gradually disappear. There are a 

 few vesicles situated in the bottom of the calix. When the epitheca is pre- 

 served, there is no indication of cysts, but when decorticated, they are numer- 

 ous, and the corallum has the appearance of a number of thin, distant, invagi- 

 nated cups. 



The thick, smooth, epithecal crust, and the strong rounded annulations, 

 and deep constrictions, and the thin, invaginated cups, make this easily recog- 

 nized from all other species. 



Found in the lower Devonian (corniferous group), at the Falls of the Ohia 

 Now in the collection of the author. 



