/ 57 
The epitheca carries in young examples one, and in aged examples many layers of corallites, 
which are arranged in a radiating manner round the central point of the coral, and which open 
very obliquely on the surface. ‘I'he calices are of large size, in general from three-fourths of 
aline to one line across, and half a line in height. Their shape is usually transversely oval, © 
or three-sided, the outerside being curved, and the two inner sidesstraight. Owingto the thin 
ness of the walls of the corallites, the calices do not appear to be separated by any interspaces 
transversely, but overlap one another. There are no traces of teeth or grooves on the interior 
of the corallite. & : 
Alveolites Goldfussi is nearly related to three European species, viz., 4. sub-orbicularis, 
(Lam.) A. Labechei (Edwards and Haime), and A. Grayi (Edwards and Haime), the first from 
the Devonian formation, and the two last from the Upper Silurian Rocks. From the first of 
these the present species is separated by the slightly larger dimensions of the corallites, and 
by the fact that the calices are destitute of the groove and corresponding process or ridge 
which are such a marked feature in the former. Alveolites Labechei, again, has decidedly 
smaller corallites, and the calices have an internal process, similar to that of 4. sub-orbicularis, 
though not so prominent. . 
Lastly, Alveolites Grayi, though larger than 4. sub-orbicularis or A. Labechei, neverthe- 
less has smaller corallites than those of 4. Goldfussi ; whilst the inner surface of the inferior 
calicinal edge carries a distinct elevated process. As regards the species of Alveolites known in 
the Devonian Rocks of North America, A. Goldfussi is too distinct to render any confusion 
possible. . 
Locality and Formation.—Abundant, and attaining a large size, in the Hamilton for- 
mation of Bartlett’s Mills, near Arkona, Township of Bosanquet. 
66, ALVEOLITES FiscHER!I (Billings). 
Alveolites Fischeri (Billings), Canadian Journal, New Series, vol. V., p. 256, fig. 6. 
Corallum in the form of a flattened, palmate or undulating expansion, which appears to 
have grown in an erect position from a strong root-stalk, and which is celluliferous on both 
sides. Size of the entire corallum unknown, but certainly large, fragments of several square 
inches in area being apparently not uncommon. Thickness from less than one line to four 
lines ; corallites oblique to the surface, the calices being transversely oval on the whole, usually 
with one curved and two straight sides, sometimes diamond-shaped, with four straight sides. 
In typical examples the calices have a long diameter of about half a line (sometimes more ) 
and a short diameter of about a fourth of a line; and they are separated by intervals of about 
half a line or less, measured either vertically or transversely across the frond. The interior 
of the calice exhibits no internal process or ridge. 
According to Mr. Billings, the calices in this species are “distant from each other about 
two-thirds of a line in the vertical, and a little less in the transverse direction of the frond.” 
I have, however, seen no examples in which the calices are so remote as this; and I can only 
suppose that Mr. Billings must have taken his measurements from older and larger specimens 
than any which have come under my observation. 
Alveolites Fischeri in some respects is closely allied to 4. Goldfussi and A. sub-orbicularis ; 
but it differs in its general form altogether, since it is celluliferous on both of its sides; instead 
of having the corallites opening on the upper surface, whilst the under surface is covered by an 
epitheca. It is also distinguished by the proportions of its corallites, which are uniformly 
smaller than in 4. Goldfussi, and which do not carry the internal process of A. swb-orbicula- 
vis. Mr. Billings records the species from the Hamilton formation, but [ have also found it, 
though rarely, in the Corniferous Limestone. 
Locality and Formation.—Corniferous Limestone of Port Colborne. Hamilton formation, 
Bartlett’s Mills, near Arkona, Township of Bosanquet. 
67. ALVEOLITES FRONDOSA (Nicholson). 
Alveolites frondosa (Nicholson), Geological Magazine, Feb., 1874. 
Corallum forming elongated, sometimes palmate expansions, which appear to have 
grown in an erect position from a rooted base, and which are celluliferous on the two sides. 
