Silurian Fossils. 9 



Kokomo limestone, in the upper part of the exposure at 

 the old George W. Defenbaugh quarry. 



Compared with Aniplexus cingulatus, Billings, the septa 

 are less numerous and extend farther toward the center of the 

 corallum. The tabulae are more nearly flat. The genus 

 Pycnostyhis differs in the compound growth of the corallum, 

 the corallites forming colonies due to gemmation. 

 Favosites sp. 



An unknown species with corallites 1.5 mm. in diameter, 

 interspersed with rather numerous smaller corallites which 

 probably are merely the initial stages of the larger ones. 

 Septal spines and pores on the walls of the corallites are 

 present. Tabulae not well preserved. 



West Union bed, one mile south of Carrs, in Lewis county, 

 Kentucky. 



A small globose specimen of Favosites, with corallites 1.5 

 to 2 mm. in diameter, with rather numerous tabulae, occurs in 

 the West Union bed northwest, of Martins, in Lewis county, 

 Kentucky. 



Favosites pyriforme-kokomoensis. 

 Plate I, Figs. 17 A-D; Plate II, Fig. 15. 



Corallum apparently small and globose, as far as may be 

 determined from the fragment at hand. This fragment has a 

 height of 2Q> mm., measuring from the point from which the 

 corallites radiate. The presence or absence of an epitheca 

 can not be determined. Corallites between 1.5 and 1.7 mm. 

 in diameter, occasionally equalling almost '2 mm. Cross- 

 section of the corallites, polygonal; walls thin, but thickened 

 during the process of silicification in a part of the specimen. 

 Pores large and distant, with elevated margin, apparently with 

 a tendency toward arrangement in vertical rows, one row on 

 each wall of the corallite. Diameter of pores estimated at 

 0.2 mm., and the vertical distance between them varies from 

 0.4 to 0.7 mm. They have a tendency to occur so that several 

 are found at about the same level. Septal spines apparently 

 short, not exceeding a third of a millimeter in lens^th, as far 



