CONTRIBUTION TO 



vially disappear. The longer ones are slightly elevated, growing thinner, con- 

 tinuing to near the center of the calyx, where they abruptly terminate, leaving 

 a smooth, flat space in the center of the calyx from two to three millimeters in 

 diameter. Fossette small, situated on the side of the longest curviture, of the 

 coral. 



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

 ana. Now in the collection of the author. 



ZAPHRENTIS LIMATUS, N. Sp. 



Plate 2, Figs. 11, 12—13. 



Corallum simple, oblique, regular or abruptly curved, acute at the base of 

 attachment, rapidly expanding in diameter to the calyx, exterior with broad 

 annulations and wrinkles, caused by intermittent growth. Height varying in 

 different individuals from twenty to forty millimeters. Calyx broadly campan- 

 ulate. from ten to thirty millimeters in diameter. Depth ten to fifteen millime- 

 ters, a flat space in the bottom of the calyx five millimeters in diameter. 

 Number of lamellae seventy in the circumference of a calyx twenty millimeters 

 in diameter, alternating in length, equal in size at the margin, gradually slop- 

 ing, to the flat space in the bottom of the calyx, where the short ones terminate. 

 The longer ones continuing to the center of the calyx, and abruptly end. There 

 is seven or eight lamellae adjacent to the right and left lateral gaps, situated on 

 the side next the shortest curvature of the coral, that converges to the gaps, 

 Fossette consists of rather a wide, deep depression in the center of the calyx, 

 grows narrower as it approaches the anterior margin. 



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

 ana. Now in the collection of the author. 



F A V O S I T- E S E O T U N D I T U B A , N. Sp. 



Plate 3, Figs. 1-2. 



Corallum variable in form, discoid with a wrinkled epitheca on the under 

 side. Globular or sub-pyriform or sub-ramose. Tubes unequal in size, round- 

 ed polygonal, from one to three millimeters or more in diameter. Diaphraghms 

 flat or oblique, and not very much crowded. Mural pores not closely arranged, 

 round, rather large, with an elevated circular lip from one-fourth to one-half 

 millimeter in height, one aud two rows on a side, 



The large round tubes, and the elevated circular lips of the mural pores, 

 and the oblique diaphraghms, distinguish this from all other species. 



Found in the Lower Devonian (Corniferous group), Falls of the Ohio. 

 Now in the collection of the author. 



