49. CONTRIBUTION TO 



wrinkles. Diameter of calix thirty millimeters. Depth twenty millimeters* 

 Number of lamellae sixty, in the circumference of a calix thirty millimeters 

 in diameter, equal and broadly rounded at the margin, slightly alternat- 

 ing below, gradually sloping to within five or six millimeters of the center of 

 the calix, where the short ones abruptly ends ; the longer ones continue to the cen- 

 ter, and either ends, or is slightly twisted, not elevated. No fossette visible in 

 any of the examples examined. 



Found in the upper Devonian (Hamilton group), near Charlestown, Indi- 

 ana. Now in the collection of the author. 



CHONOPHYLLUM I N FU ND I B U LUM, N. Sp. 



Plate 18. Figs. 6-7-8-9-10. 



Corrallum simple, turbinate, or elongate turbinate, straight or irregular 

 curved. With a broad scar at the base of attachment, and sometimes continu- 

 ing a short distance on the side of the coral. Exterior somewhat rugged, with 

 coarse annulations and deep constrictions, caused by intermittent growth. 

 Gradually and sometimes more rapidly expanding in diameter to the calix. 

 Height varying in different examples from ten to eighty-five millimeters in the 

 largest examples observed. Calix broad, somewhat funnel-shaped, from ten to 

 forty millimeters in diameter. Depth ten to fifteen millimeters, with a deep 

 convex space in the center of the calfx, six or seven millimeters in depth, and 

 four millimeters in diameter. Number of lamellse, sixty-four in the circumfer- 

 ence of a calix, thirty millimeters in diameter, thin, sharp, and equal in size at 

 the margin, alternating below, gradually sloping to the edge of the deep convex 

 space in the bottom of the calix, where the short ones gradually terminate; the 

 longer ones continue and abruptly turns down the sides of the convex depres- 

 sion, and continue to the bottom, and gradually disappears. The deep convex 

 space in the center of tjhe cup gives to the calix the decided funnel-shaped ap- 

 pearance. No fossette. In appearance this may be mistaken for C Typicum, 

 but the thin, sharp lamelUc, and funnel-shaped calix, makes this easily recog- 

 nized from all other species. 



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

 ana. Now in the collection of the author. 



