. Report upon the palaeontology of the province of Ontario [microform]. Paleontology; Paléontologie. 104 t t 4. Specimens which are casts of thr interior of the frond, to which the innermost mem- brane with the ends of the perpendicular columns still remain attached, are not uncommon rFig. 40 A & C')- These show that the columns are arranged in beautifully regular diagonal lines ; and their inner ends seem to have been convex, as they leave in many cases concave or cupped scars, of an oval or rhomboidal shape, upon the outside of the cast 'Fig. 40 B). 5. One specimen exhibits a strong hori
. Report upon the palaeontology of the province of Ontario [microform]. Paleontology; Paléontologie. 104 t t 4. Specimens which are casts of thr interior of the frond, to which the innermost mem- brane with the ends of the perpendicular columns still remain attached, are not uncommon rFig. 40 A & C')- These show that the columns are arranged in beautifully regular diagonal lines ; and their inner ends seem to have been convex, as they leave in many cases concave or cupped scars, of an oval or rhomboidal shape, upon the outside of the cast 'Fig. 40 B). 5. One specimen exhibits a strong horizontal foot-stalk, from which the frond grew up vertically (Fig. 40 C). This foot-stolk is branched at both ends, its surface is covered in parts with vermicular stria?, and its structure appears to have been minutely tubular or cellular. 6. Lastly, some specimens appear to show tbe extraordinary character of a second frond, quite similar in structure to the first, invaginated within the outet one, so as to give rise to an internal cone closely applied to the internal surface of the external funnel. It is possible, however, that this appearance may admit of some other interpretation. I have treated species at some length on account of its very remarkable and compli- cated structure ; but there are still several points connected with it which I have been unable to make nut with my present materials. Specimens are by no means particularly rare, but I have seen none which arc not fragmentary. L-axUfy and Formation.—(Jorniferous Limestone of Port Colborne and Lot 6, Con. 1, Wainfleet. Oenus Fenestella (Lonsdale). Polyzonry for:ning a calcareous, flattened or infundibuliform expansion, composed of sub- parallel branches, which radiate from the base, and are united laterally by cross-bars or disse- piments, so as to form a network, the meshes of which aro in general more or less oblong or sub-quadrate. One surface of the branches (in the infundibuliform species the innn surf
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