. Handbook of zoology [microform] : with examples from Canadian species, recent and fossil :. Zoology; Invertebrates; Zoologie; Invertébrés. Il p^ Iha 58 (1) Calcarca, or those supported by calcareous spicules; (2) ^ilicea, or those supported by silicous spicules; and (8) Keratoma, or those having only horny fibres. All our common native sponges belong to the second of these groups. Several kinds of Protozoa of affinities not quite certain, occur in the older Silurian rocks of Canada. Of these may be mentioned Receptaculites ; (Fig. 40.) supposed by Salter to bo a Foraminifer
. Handbook of zoology [microform] : with examples from Canadian species, recent and fossil :. Zoology; Invertebrates; Zoologie; Invertébrés. Il p^ Iha 58 (1) Calcarca, or those supported by calcareous spicules; (2) ^ilicea, or those supported by silicous spicules; and (8) Keratoma, or those having only horny fibres. All our common native sponges belong to the second of these groups. Several kinds of Protozoa of affinities not quite certain, occur in the older Silurian rocks of Canada. Of these may be mentioned Receptaculites ; (Fig. 40.) supposed by Salter to bo a Foraminifer; and i\LQ%'^QQ\Q^oiAreliceocyathus, Calathium, Trichos- pongia and Rliabdalla described by Mr. Billings and supposed by him to be allied to Porifera.* A species of Dentalina occurs in the Lower Car- boniferous of Nova Fig. RKCEPTActjLiTES OccidentALI8, (Salter); (a) Portion of surface removed, ehowing iuterior structure. 8. lufiisoria. Examples of these creatures may be found in stagnant water, or in any vegetable infusion which • Palaeozoic Fossils of Canada, Vol. I. t Acadian Geology^ 2nd Edition,. 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 Dawson, J. W. (John William), Sir, 1820-1899. Montreal : Dawson
Size: 1775px × 1408px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1870, booksubjectzoology, bookyear1870
