DEVONIAN FOSSILS. 501 



equal to their own diameter. What the shape of the orifice may have been 

 originally it is impossible now to determine. In its present condition the 

 corrallum resembles C. labiosa and C. pinguis, both of Rominger, 1 but more 

 especially the form figured as a variety of C. labiosa. 2 



The form under discussion resembles G labiosa in the slenderness of 

 the stem, but the pores are more distant, and at present not labiate. It 

 resembles C. pinguis in the thick interstitial tissue between the cells and 

 in the less labiate condition of the latter ; but the branches are less robust 

 and the cell apertures apparently smaller. 



Formation and locality: Three Forks limestone, near the divide 

 between Gallatin Valley and Panther Creek, Bighorn Pass, Gallatin Range, 

 bed 21; S. L. Penfield. 



FAVOSITES Lamarck, 1812. 



Favosites sp. 

 PI. LXVI, fig. 8«. 



Corallum rather small, about 50 mm. (?) in diameter; cells small, very 

 closely tabulate, tabulae being about 0.5 mm. apart. Number of rows of 

 mural pores, character of the same, and nature of the epitheca, not known. 



The material submitted was not found in place. It consists of a frag- 

 mentary silicified example, which, while showing some characters very 

 plainly (e. g., the tabulation), has others obliterated so that specific identi- 

 fication of the form is impossible. It can, however, be affirmed that it does 

 not belong to any Carboniferous representative of the genus, at least such 

 as are yet described, and it can therefore with great probability be regarded 

 as belonging to Devonian or Upper Silurian time. 



Formation and locality : Three Forks limestone, north side of Soda 

 Butte Creek, Absaroka Range; J. P. Iddings. 



1 Geol. Surv. Michigan, Vol. Ill, Pt. II, 1876, pp. 52-53, PI. XXI, figs. 2, 3. 

 2 Loc. cit., fig. 3, lowest specimen. 



