42 
—— 
at all. The only traces of the connecting processes consist in occasional spiniform or tubercu- 
lar projections of the epitheca, which do not, however, reach contiguous corallites. According 
to Mr. Billings, the distance between the corallites varies from three to eight lines ; but in all 
the specimens I have seen, the distance is less than this. In fact, owing to the flexuous. 
course taken by the corallites, and more especially to their being by no means strictly par- 
allel, their distance apart is very variable; and they are very often in contact for considerable 
distances. In the absence of septa and in possessing infundibuliform tabule, the present form 
agrees with the normal examples of Syringopora. , 
Locality and Formation.—Rare in the Corniferous Limestone of Lot 6, Con. 1. Wainfleet. 
Also at Woodstock (Billings). 
Genus AULOPORA (Goldfuss). 
Corallum creeping, increasing by parietal gemmation ; the corallites pyriform, trumpet- 
shaped, or cylindrical, the cavity of each communicating with that of the one from which it 
springs. No tabulz ; septa absent, or represented in a rudimentary form by longitudinal 
strize, or rows of minute spines. 
The corals of the genus Awlopora have often the closest resemblance to young colonies of 
Syringopora, before the latter have commenced to throw up corallites vertically. ‘There is thus 
reason to think that some of the described species of Awlopora may be truly o* the nature of im- 
mature examples of Syringopora, though others appear to be undoubtedly mature and distinct. 
Mr. Billings has described three species of this genus, all peculiar to Canada, from the 
Corniferous Limestone of Western Ontario, and all of these have come under my notice. I 
have also to record specimens which appear to be in every respect undistinguishable from A, 
tubeformis (Goldfuss). f 
43. AULOPORA FILIFORMIs (Billings). 
Aulopora filiformis (Billings), Canadian Journal, New Series, Vol. IV. p. 119. 
Corallum fixed, creeping, forming, somewhat confused groups, which adhere parasitically 
to foreign bodies. Corallites about one-third of a line in diameter. Epitheca thick, with 
numerous fine encircling striae. Corallites usually budded forth at intervals of from one-third 
of a line to a line, sometimes further apart, their length being from half a line to-a line and 
a-half. Generally, the young corallites are produced in an alternating manner upon the two 
sides of the parent stem, but not uncommonly two, three, or four tubes may be produced at a 
single point, and any individual corailite may commence to throw out buds for itself. The 
tubes are often more or less bent, and their apertures are elevated above the surface upom 
which the coral grows. 
This beautiful little species 
is of common occurrence in the 
Hamilton formation, growing 
parasitically upon Spircfera 
mucronata, Cyrtina Hamitto- 
nensis, Heliophyllum Halli, Cys- 
liphyllum  vesiculosum, the 
epitheca of species of Havosites,, 
&e. It is readily distinguished 
from the other species of the: 
genus by the small size of the 
Fig. 11. tubes, and also by its peculiar 
a. Aulopora filiformis (Billings), growing parasitically upon Spirifera mucrona- mode of growth. It is allied. 
ta. b. Portion of the same enlarged. Hamilton Formation, Arkona, to Aulopora arachnoidea (Hall) 
of the Trenton Limestone, but is a larger form, and occurs in morevreticulating and com- 
pressed groups. 
Locality and Formation.—Common in the Hamilton Formation of the Township of Bosan- 
quet. Very rare in the Corniferous Limestone (Billings).* 
*The fossil which I described under the name of Alecto? Canadensis (Canadian Naturalist, Vol. vii., No. 3), Was: 
founded upon casts obtained in the Corniferous Limestone. Having now obtained examples from the Hamilton group, in 
which the actual fossil itself is preserved, I am disposed to regard this singular form as a somewhat anomalous Awlopora- i 
shall, therefore, describe it in the Appendix to this Report, under the name of Aulopora Canadensis. 
