42 TRANSACTIONS OF THE ROYAL CANADIAN INSTITUTE. [VOL. XI 
FAVOSITES HISINGERI, Milne-Edwards and Haime. 
FAVOSITES HISINGERI, Milne-Edwards and Haime. Polyp. Foss. des Terr. Palaeoz., 
p- 240, pl. XVII, figs. 2, 2a and 2b, 1851. 
FAVOSITES HISINGERI, Lambe. Geol. Sur. Can., Cont. to Can. Pal., Vol. IV, pt. 1, p. 6, 
1899. (For extended synonomy see this work.) 
FAVOSITES HISINGERI, Parks. Bur. Mines of Ont., 22nd Rep., p. 182, 1913. 
One broken specimen indicating a hemispheric corallum about 70 
mm. in diameter. The corallites are about 1.5 mm. in diameter. The 
mural pores are relatively large and are arranged in one or two rows 
on the sides of the corallites. The tabule are flat and vary from 2 to 3 
or even 4 in one mm. The long spiniform septa, characteristic of the 
species, are not as well shown as the other features, but in certain parts 
of the corallum they are distinctly discernible. Other similar speci- 
mens. 
Locality—Limestone rapids and Assina rapids, Severn river, District of Patricia, 
Ontario. 
Horizon—Silurian. 
Nos. 304 S. and 343 S. Royal Ontario Museum of Palaeontology. 
Cf. FAVOSITES GOTHLANDICA, Lamarck. 
FAVOSITES GOTHLANDICA, Lamarck. Hist. des An. sans Vert., Vol. II, p. 206, 1816. 
FAVOSITES GOTHLANDICA, Lambe. Geol. Sur. Can., Cont. to Can. Pal., Vol. IV, pt. 1, 
p. 3, pl. I, fig. 1, 1899. (See this work for extended syno - 
nomy.) 
Two specimens from different localities are provisionally ascribed 
to this species, but specific determination of Favositoid corals demands 
much better material than that in hand. 
One specimen from the Limestone rapids, Severn river, is evidently 
part of a large corallum. The corallites are extremely variable in size, 
closely appressed, polygonal, reaching a diameter of over five mm. 
The tabule are flat or slightly wavy and closely set; they average some- 
what more than a millimetre in spacing. No septa, septal spines, or 
mural pores are to be seen. Without these latter features, specific 
differentiation is of course impossible, but as F. gothlandica has been 
reported from the region it is a reasonable assumption that our form 
belongs to that species, although the tabule are more closely set than 
is usual in specimens with corallites of the present size. 
The second specimen is from the Limestone rapids of the Fawn 
river: it shows corallites of about 3 mm. maximum diameter. The 
tabule are regularly arranged at a distance of 1 mm. from each other. 
