169. CONTRIBUTION TO 



flat or slightly oval, and closely arranged. JSJuruber of lamellae, sixty to sev- 

 enty, alternating in size, the shorter ones scarcely more than rudimentary; the 

 longer ones at the margin rather obscure. For about five or ten millimeters 

 they gradually slope, and at this point they become elevated and sharp, and 

 abruptly descend to the bottom of the calix, and extend a short distance on the 

 tabuUf, and abruptly terminate, leaving a smooth, convex space in the bottom 

 of the calix, from five to fifteen millimeters in diameter. Interseptal area 

 vesicular. Fossette conspicuous, consists of a deep depression at the edge of 

 the smooth convex space in the bottom of the calix, but does not extend on 

 the side of the cup. A specimen in my collection shows in some of the coral- 

 lites two well defined fossettes situated opposite to each other. 



Found in the St. Louis group, (sub-carboniferous) four miles south-east of 

 Mammoth Cave, Kentucky. Now in the collection of the author. The specific 

 name is in honor of Mr. Charles Very, of New Albany, Indiana. 



PKOTOPORA, N. Gen. 

 (Ety. Protos, first; and Pora, a pore). 



Coralluoi composite, increasing by lateral and calicular gemmation. Cor- 

 allites frequently connected by their epithical walls, and having numerous 

 transverse and oblique diaphrams which divide the tubes into coarse cysts 

 somewhat like Cystelasma, but differing from Cystelasma in having mural pores 

 in the adjoining corallites as in Eomingeria. Type P. Cystoides. 



PKOTOPORA CYSTOIDES 



Example, Romingeria Cystoides, Grabau, contribution to Indiana Palaeontology, Part VII, 

 page 52, plate 20, figures 19 to 23, May 23, 1901. 



CYSTIPHYLLUM FULCRATUM, N. Sp. 



Plate 50. Fig. 1. 



Corallum simple, turbinate or elongate turbinate or cylindrical. Straight 

 or slightly curved. Very blunt and rugged at the base of attachment. Fre- 

 quently strong, root-like prolongations set out near the base, that serve for at- 

 tachment and support. For about three inches rapidlj/ enlarging, then the di- 

 ameter is essentially the same to the margin of the calix. Height seven inches. 

 Calix very shallow and oblique. Sixty millimeters in diameter. Exterior very 

 rugged; when decorticated it has the appearance of a series of thin invaginated 

 cups, with numerous spines covering the spaces between the cups, commencing 

 on the surface of one cup and reaching to the bottom of the succeeding one. 



