THE DEVONIAN FOSSILS OF CANADA WEST. 253 
Genus StRiaTOPORA.—( Hall.) 
Fig. 2. Fig. 3. Fig. 4. 
Fig. 1. Striatopora Linneana. < 
Figs. 2,3, 4. Trachypora elegantula.—Fig, 4 is a portion enlarged: the upper figure a 
longitudinal section. 
Generic characters.—‘‘ Ramose, coralla solid; stems composed of 
angular cells; apertures of cells opening upon the surface into ex- 
panded angular cup-like depressions; interior of the cell rayed or 
Striated, strice extending beyond the aperture of the cell.’””—(Hatt. 
Paleontology of New York, vol. 2, page 156.) 
Sraratorora Linneana.—W. Sp. 
Description.—Stems two or three lines in diameter, branching at an 
angle of from 75° to 80°; cells variable in size, the greater number 
with the expanded mouth one line wide, and the circular cavity at the 
bottom from one-third to one-half of a line; the smaller or younger 
cells, of all sizes, are somewhat uniformly distributed among the 
larger. In the perfect specimens the mouths of the cells are every- 
where in contact with each other, the edges of the walls between 
them sharp, and the form more or less polygonal, generally five or six 
sided. In worn specimens the cells are more nearly circular, and the 
walls obtusely rounded on the edge. The striz in the cell mouths 
not observed. I have seen only two specimens of this spécies, and 
am unable, therefore, to state to what extent the stems may vary in 
thickness. In S. rugosa (Hall),* Hamilton Group, Iowa, the cells 
are distant from each other nearly their own diameter, and the stem 
is branched at an angle of about 55° (in the specimen figured). In 
S. flexuosa (Hall),+ Niagara Group, the cells are, upon an average, 
more than one line and a half wide, and many of them two lines. 
Our species, therefore, must be regarded as distinct from either. 
* Geology of Iowa. Vol.1, Part 2, page 479, Pl. 1, fig. 6. 
+ Paleontology of New York. Vol. 2, page 156, pl. 40 B, fig. 1a. 
