INDIANA PALEONTOLOGY. 75. 



FAVOSITES SEAMANI, N. Sp. 



Plate 25. Fig. 1. 



Corallum ramose, with short, cylindrical, nodose stems, with a hollow cen- 

 tral axis, when free from foreign substance. Tubes rounded, unequal in size, 

 from one to two millimeters in diameter. Tabulne flat or oblique, in places 

 closely arranged, and complicated with squamic, in other places more distant. 

 Pores rather large, round, one and two rows on a side. 



Some corallums, have broad thin basal expansions, and others are found 

 attached to and completely covering the end of a stem of another coralla, and 

 by its weight have broken the stem, and become free, or these may have been 

 broken off by waves or currents. 



The nodose character of the stems, and the hollow central axis, will readily 

 distinguish this from all other species of the ramose type. 



The specific name is in honor of Prof. A. E. Seaman, Professor of Natural 

 Science in the Michigan Mining School, Houghton, Michigan. 



Found in the Lower Devonian (Corniferous group) at the Falls of the 

 Ohio. Now in the collection of the author. 



CERATOPORA FLABELLATA, N. Sp. 



Plate 2-5. Figs. 2, 3-4. 



Corallum rapidly increasing by lateral gemmation, with closely aggregated 

 tubules, spreading in fan-like expansions in more than one direction, Coral- 

 lites closely connected more or less throughout their entire length, gradually 

 enlarging in diameter to the margin of the calyx. Diameter of tubes varies 

 in the same corallum from two to four millimeters, and occasionally there is a 

 tube much larger. When the walls are in contact with each other, large 

 rounded pores may be observed. The spines in the tubes are not well defined, 

 but the bases can be seen in all well preserved tubes. Exterior with numerous 

 annular lines of growth, more strongly pronounced near the margin of the 

 tubes. 



The Fan-like growth of the corallum, and the closely aggregated corallites, 

 and their oblique dilated orifices, will distinguish this from all other species. 



Found in the Upper Devonian (Hamilton group) in a cut on the B. and O. 

 R. R., one and a half miles northeast of Jeffersonvilie, Indiana. Now in the 

 collection of the author. 



