63 
Genus FistuLiPoRA (McCoy). . 
“ Corallum encrusting or forming large masses, composed of long, simple, cylindrical, thick- 
walled tubes, the mouths of which open as simple, equal, circular, smooth-edged cells on the sur- 
face, and have numerous transverse diaphragms at variable distances; intervals between the tubes 
oceupied by a cellular network of small vesicular plates, or capillary tubules traversed by dia- 
phragms.” (Brit. Pal. Foss. p.11). The genus Fisfulipora presents close affinities to the 
genus Heliolites and also to Callopora. From the former, Fistulipora is distinguished by the 
fact that the corallites are destitute of septa, whilst it differs from the latter genus in the fact 
that the coenenchyma is regularly tubular, and that both the corallites and the intervening 
tubuli are traversed by numerous and regular tabule. , 
One species of the genus, viz. /’. Canadensis (Billings), has been recognised as occuring 
in the Devonian rocks of Canada. . 
74, FistuLIpoRA CANADENSIS (Billings), 
Fistulipora Canadensis (Billings) ; Geol. Survey, Canada, Rep. for 1857, p. 175; Cc-" 
nadian Naturalist, Vol. IIL, p. 420; and Canadian Journal, New Series, Vol. IV, p. 98, 
Rig. 1, 
Corallum forming irregular masses, or, more commonly, large undulating crusts or ex- 
pansions, from: half an inch to an inch or more in thickness. Under surface covered with a 
thin concentrically-wrinkled epitheca. Corallites perfectly cylindrical, from a third of a line 
to half a line in diameter, usually about half a line distant from one another, sometimes one 
line or more, their mouths slightly projecting above the general surface. Ccenenchyma com- 
posed of minute, polygonal or sub-circular tubuli, of which from two to four occupy the space 
of one line. The number of tubuli separating the various corallites varies from a single row 
up to three or four rows. Both the corallites and the intermediate tubuli of the coonenchyma 
exhibit numerous close-set and well developed tabule. 
Fistulipora Canadensis occurs very abundantly in both the Corniferous Limestone and 
the Hamilton formation of Western Ontario; and though there are some slight differences 
between the examples from these two formations, these differences do not appear to be of spe- 
_ cific value. F. Canadensis is very closely allied to F. decipiens (McCoy), from the Upper 
Silurian Rocks, the chief or only distinction of importance being that the tubuli of the coen- 
enchyma are considerably larger in the former than they are in the latter. 
Locality and Formation.—Common in the Cornifzrous Limestone of Port Colborne, 
Ridgeway, Hagersville, &c. Also in the Hamilton formation at Bartletts’s Mills, near 
Arkona, Township of Bosanquet. 
6 . 
Genus MICHELINIA (De Koninck), 
_ Corallum composite, forming hemispherical, depressed, or pyriform masses of prismatic or 
sub-cylindrical corallites. Walls of the corallites perforated by mural pores.. Tabulze well de- 
veloped, vesicular. Septa represented by vertical striz or ridges. Hpitheca concentrically 
wrinkled, with root-like prolongations. 
The corals of the genus Michelinia approximate closely in their general characters to | 
those belonging to Favosites. Michelinia is distinguished, however, by the vesicular nature of 
the tabulz, the generally larger size of the corallites, and the fact that the septa are present 
merely in the form of striz. 
Mr, Billings has described three species of Michelinia, (viz., M. convexa, M. intermittens, 
and IM. favosoidea,) as occuring in the Corniferous Limestone of Western Ontario. Of these, 
only the well known WW. convexa has come under my notice. 
75. MICHELINIA CONVEXA (D’Orbigny). 
Michelinia convexa (D’Orbigny ), Prodr. de Paléont, t. I. p. 107. 
Michelinia convexa (Billings), Canadian Journal, New Series, Vol. 1V. p. 112, Fig. 13. 
Corallum forming hemispherical or pyriform masses of large size. Corallites polygonal, 
of unequal sizes, the larger ones from four to five lines in diameter, the smaller ones from ore 
