59 . 
though it would appear that this is really identical with the previously described S.(Cyathopora) 
Towensis of Dale Owen. Lastly a species of the genus has been recorded by Messrs. Meek & 
Worthen, from the Lower Helderberg group of Missouri, under the name of S. Missowriensis 
(Geology of Illinois, Vol. III. p. 369, Plate VII. Fig. 4). 
68. SrrraToPpoRA LINNEANA (Billings). 
Striatopora Linneana (Billings), Canadian Journal, New Series, Vol. V. p. 253, Fig. 1. 
“Stems, two or three lines in diameter, branching at an angle of 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 amongst the larger. In the perfect specimens the mouths of 
the cells are everywhere 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 ”’ (Billings, loc. cit. p. 253). 
This species is by no means of common occurrence. The few examples which exhibit 
the internal contracted aperture at the bottom of the expanded calice, can be determined with 
ease ; but those in which these apertures are concealed, can hardly be separated from a small 
undetermined /'dvosites which abounds in the same beds. The Favosites in question occurs in 
the form of small sub-cylindrical, irregularly lobed, or sub-palmate masses, generally from an 
inch to an inch‘and a half in height, the corallites being unequally sized, polygonal, and thin- 
walled. The difficulty is still further increased by the fact that Striatopora Linneana does 
not appear to possess the radiating striz which are so characteristic of the genus. 
Locality and Formation.—Rare in the Hamilton Formation of Bartlett's Mills, near 
Arkona, Township of Bosanquet. 
Genus TRACHYPORA (Edwards and Haime),. 
“ Corallum dendroid, the branches presenting calices which are only slightly salient, and 
in which there are no radiating septa; coenenchyma very abundant, solid, and with the surface 
marked by strong irregular, vermicular, and sub-echinulated strie.” (Edwards and Haime, 
Pol. Foss. des Terr. Paléoz. p. 305). 
M. M. Edwards and Haime have described one species of this genus (7. Davidsoni) from 
the Devonian Rocks of Europe, and Mr. Billings has recorded another (7°. elegantula) from the 
Hamilton group of Ontario. 
% 
69. TRACHYPORA ELEGANTULA (Billings). 
Trachypora elegantula (Billings), Canadian Journal, New Series, Vol. V. p. 254. 
Corallum solid, ramose ; the stems from one and a half to two lines in diameter, branch- 
ing at an angle of 75°. Corallites arranged in four or five rows, parallel with the direction 
of the axis of the branch. Calices excavated in the ccenenchyma, oval, about two-thirds of a 
line in their long or vertical diameter, and half a line in their short or transverse diameter. 
The calices are surrounded by a prominent margin, and are usually separated by intervals of 
about half a line. Not uncommonly an extra corallite is intercalated between the regular, 
vertical rows. The surface of the ccenenchyma is ornamented with slightly flexuous broken 
strize, four or five of which occupy the space of one line. 
This elegant species is readily distinguished from the only other known form of the 
genus (viz., 7. Davidsoni) by its cells arranged in a linear series, and its non-echinulate striz. 
Locality and Formation.— Hamilton Formation of Bartlett's Mills, near Arkona, Town- 
ship of Bosanquet. 
Genus CH@TETES (Fischer). 
_ Corallum ramose, massive, or incrusting, composed of elongated basaltiform corallites, 
which are in close contact, and are not united by any coonenchyma. Tabule well developed ; 
septa absent ; no mural pores. 
