ANTHOZOA. 



53 



on a level with the margin; the septa are thick, scarcely denticulated, with but a small 

 portion of their edges free; the carinae are few and clumsy and chiefly developed in 

 the region immediately surrounding the central area. Around the edge of the central 

 area both primary and secondary septa are conspicuously thickened, the carinae are 

 also developed there better than elsewhere, the effect being to produce in polished sec- 

 tions the appearance of a bi-areal coral with a central area bounded by a definite inner 

 wall. Under the magnifier this wall is never complete. The thickened septa and strongly 

 developed carinae never quite coalesce, so that the outer area is never, as in true bi- 

 areal corals, perfectly shut off from the central space. At the margin of this central 

 space the secondary septa all end more or less abruptly, and only the primary septa 

 are continued as thin non-carinated lamellae into the central area." 



Remarks — -The species is abundant at one horizon in the Callaway limestone and is 

 common in the Mineola limestone. The range in form seems to be as large as between 

 Acervularia profunda and Acervularia davidsoni from the Iowa Devonian. 



Subclass Hexacoralla 



Order Madreporaria 



Suborder Tabulata 



Family Favositidae 

 Genus Favosites Lamarck 



Fig. 4. Sections of Favosites alpenensis Winchell 



2. Cross section near the base where the walls are thick. (X5. 



3. Vertical section where the walls are thin. (X5.) 



(Mineola limestone of Ralls County) 



Sections of Favosites sp. undet. 



1. Vertical section (X5) 



4. Section to show arrangement and size of pores. (X5.) 



(Devonian of Callaway County, formation uncertain) 





Favosites alpenensis Winchell 



Plate 2, figures 1-3. 



1866. Favosites alpenensis Winchell, Rep. Lower Pen. of Michigan, p. 88. 



1876. Favosites hamiltonensis Rominger, Geol. Sur. Mich., Foss. Corals, p. 28, pi. 



VII, figs. 3 and 4. 

 1892, Favosites gothlandica Whiteaves, Contr. to Can. Paleon., vol. I, pt. IV, p. 272. 



