. Report upon the palaeontology of the province of Ontario [microform]. Paleontology; Paléontologie. T\g. 25. a. Ventral valve of Chonetes acvti-radiata (Hall), natural (after Hall); b, Ventral valve of another specimen of the same from T,_nnnrtionnf/> width nf the shell alontr th« the Limestone of Ontario, natural hIzo. proportionate WlQin 01 ine BOeil ai0D„ ID« hinge-line as compared with the length, the flattening of the cardinal extremities, and the lesn convexity of the ventral valve. The striation is also finer than it is in S. hemispherica. Localty and Formation.—Rare in
. Report upon the palaeontology of the province of Ontario [microform]. Paleontology; Paléontologie. T\g. 25. a. Ventral valve of Chonetes acvti-radiata (Hall), natural (after Hall); b, Ventral valve of another specimen of the same from T,_nnnrtionnf/> width nf the shell alontr th« the Limestone of Ontario, natural hIzo. proportionate WlQin 01 ine BOeil ai0D„ ID« hinge-line as compared with the length, the flattening of the cardinal extremities, and the lesn convexity of the ventral valve. The striation is also finer than it is in S. hemispherica. Localty and Formation.—Rare in the Corniferous Limestone of Port Colborne. Genus Productella (Hall). " Shells having the general form of Eroductus, but uniformly with a narrow area on each valve, a foramen or callosity on the ventral area, small teeth, and more or less distinct teeth- Bockets. The reniform vascular impression, rising from between the anterior and posterior occlnsor muscular impressions, curves gently outwards, and following a curvature somewhat parallel with the margin of the shell to below the middle of its length, is abruptly recurved, and the extremity, turned a little backwards, terminates about half way between the margin 4. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Nicholson, Henry Alleyne, 1844-1899. [Toronto? : s. n. ]
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectpaleontology, bookyea
