54 THE DEVONIAN OF MISSOURI. 



1899. Favosites alpenensis Lambe, Contr. to Can. Paleon , vol. IV, pt. I, p. 18. 

 1909. Favosites alpenensis Grabau and Shinier, North American Index Fossils, I, p. 87. 

 1911. Favosites alpenensis ? Cleland, Wisconsin Geol. Surv., Bull. 21, p. 31, pi. I, 

 fig. 8. 



Lambe's description — "Corallum massive, irregular in shape, attaining sometimes a 

 diameter of about 1 foot with a height or thickness of 4 or 5 inches. Corallites prismatic, 

 unequal in the same specimen, varying from 1 to 2.5 mm. in width. Pores of moderate 

 size, about .25 mm. in diameter, occurring generally in one row, though sometimes in 

 two rows in the sides of the corallites. A slightly raised margin is seen round many of 

 the pores but this is evidently not a constant character as very frequently the edges of 

 the pores are quite plain or even slightly depressed when weathering would not ac- 

 count for the change. Tabulae complete, horizontal, at times slightly concave or convex; 

 frequently exhibiting marginal depressions. Squamulae few in number, rather small, 

 narrow and rather short, extending only a short distance into the corallites. Inner 

 surface of corallites faintly striated longitudinally. 



This species is distinguishable from other Devonian Favosites principally by the 

 size of the corallites whose sides have most frequently only one row of pores and by the 

 fewness and small size of the squamulae as well as the large number of well developed 

 tabulae." 



Remarks — Modal corallites of the Missouri specimens are about 1.3 mm. in dia- 

 meter. The tabulae average about .5 mm. apart but some are more than a millimeter 

 apart. The ordinary size of Missouri specimens is 8 to 12 cm. in diameter. 



Occurrence — The species is abundant at one horizon in the Callaway and it also 

 occurs in the Mineola and Cooper. 



Favosites lintitaris Rominger 

 Plate 3, figure 1. 



1876. Favosites limitaris Rominger, Fossil Corals, Geol. Surv. Michigan, vol. Ill, 



pt. 2, p. 36, pi. 13. 

 1883. Favosites limitaris Hall, Indiana Dept. Geol. Nat Hist., 12th Ann. Rept., pp. 



256-257, pi. 4, figs. 5, 6. 

 1885. Favosites limitaris Davis, Kentucky Fossil Corals, pi. 30; pi. 31, fig. 1. 

 1909. Favosites limitaris Grabau and Shimer, North American Index Fossils, I, p. 88, 



fig. 142. 

 Rominger' s description — "Ramified and reticulated stems,, from five to fifteen 

 millimeters in thickness, forming horizontally explanate expansions or erect fruticose 

 ramifications. Tubes very thick-walled, opening nearly rectangularly to the surface, 

 with circular orifices, the walls forming either a solid, undefined interstitial mass, or 

 in another state of preservation, the polygonal outlines of each tube are visible on the 

 surface of the interstices as delicate engraved lines. Several varieties are observed in 

 regard to the mode of growth and the size of tubes. The tube orifices rarely exceed the 

 diameter of one millimeter; often they are smaller, and in some forms they are all equal 

 in a specimen; others have smaller and larger orifices intermingled. A part of the 

 orifices on the side faces of the stems are often found closed by opercula, situated below 

 the outer edge of the channels; in the interior parts of the tube channels diaphragms 

 are not regularly developed, and are of rare occurrence. Pores, large, distant, and 

 irregularly dispersed. In older stems the tube channels not unfrequently become con- 

 siderably narrowed by excessive incrassation of the tube walls, while the pore channels 

 gain in length and width, and appear on the surface as vermicular, transverse channels 

 connecting the tube channels, which later are, in their narrowed condition, hardly 

 larger than the connecting pore channels." 



Remarks — This species is common in the Callaway limestone associated with 

 Acervularis davidsoni Edwards and Haime. It occurs also in the St. Laurent of Ste. 



