39 
= 
short, thick, and extending only about half-way in from the margin towards the middle (the 
central region being smooth), numbering from twenty to twenty-five at their inner ends, but 
each bifurcating so as to double this number at the margin ; sometimes the one on the side: 
opposite the fossette is divided into three.” (Meek and Worthen, loc. cit.). 
Having only obtained a 
single well preserved spe- 
cimen of this pretty little 
coral, nowfor the first time 
recorded from Canada, I 
havenothing ofimportance 
to add to the above des- 
cription. Our specimen 
Fig. 9. has a diameter of five lines, 
Microcyclus discus (Meek and Worthen) ; a upper surface, enlarged. (The cross shows anda height of half a line ; 
the true dimensions) ; } under surface of the same specimen, of the natural size. and the flat central area of 
the calice is at one point elevated into a small pointed boss, 
Locality and Formation.—Rare, in the Hamilton formation, at Bartlett’s Mills, near 
Arkona, Township of Bosanquet. * 
3 
Genus HAIMEOPHYLLUM (Billings). 
“ Corallum aggregate, consisting of colonies of long slender sub-parallel corallites, united 
laterally by periodic expansions of the cup. Internal structure of vesicular diaphragms, as in 
the genus Michelinia ; radiating septa rudimentary” (Billings). The following species, 
from the Corniferous Limestone is at present the only one known. 
37. HAIMEOPHYLLUM ORDINATUM (Billings). 
Haimeophyllum ordinatum (Billings), Canadian Journal, New Series, Vol. IV. p. 139, 
Fig. 29. 
‘“‘Corallum forming large, sub-globular or flat hemispheric masses ; average diameter of 
the corallites in the constricted portions one line and a half to two lines, and of the expansions 
two and a half to three and a half lines, The epitheca; where it can be seen between the 
expansions, is more or less distinctly marked with the horizontal septal striz. There appears 
to be about forty internal strie. The expansions which connect the corallites are periodical, 
or occur at the same level in all the individuals at distances of from one to three lines” 
(Billings). 
This remarkable coral cannot be confounded with any other, its peculiar mode of growth 
appearing alone to be quite distinctive. The larger masses appear to be formed of successive 
strata, the corallites of each stratum being usually short (half an inch in height), and being 
superimposed upon those of the inferior strata, not directly but alternately, so that the coral- 
lites of one stratum appear to spring from the periodic calicine expansions of the corallites in 
the stratum below. All examples, however, do not show this; and it is possible that the spe- 
cimens exhibiting this peculiarity are referrible to a new species. 
Locality and Formation.—Corniferous Limestone of Port Colborne, Hagersville, and 
Lot 6, Con. 1, Wainfleet. 
Genus SYRINGOPORA (Goldfuss). 
Corallum aggregate, at first creeping, after the manner of Axlopora, then sending up 
numerous vertical, cylindrical corallites, which are usually flexuous and sub-parallel, and are 
connected together laterally by numerous transverse connecting processes. Epitheca well 
developed ; septa, rudimentary ; tabulz, close-set and infundibuliform, or placed within one 
another like a series of funnels. 
The characters of the genus Syringopora are very well marked, and as a rule there is not 
the smallest difficulty in recognising any example of thisgenus. If, however, the Syringopora 
lavata, and S. nobilis of Mr. Billings are to be retained here, then the definition of the 
genus must be somewhat modified, since the corallites of the former species have the habit of 
