. Handbook of zoology with examples from Canadian species, recent and fossil [microform]. Zoology; Invertebrates; Zoologie; Invertébrés. 166 PROVINCE MOLLUSCA. Nautilii)/F,.—The type of this family \s\.\\e iVauiilus pompiiius. In our Silurian and Devonian rocks we have species of the allied genera lAtuites and ClvDienia, and a fine lyautilus occurs in the Carboniferous (Fig. 218). £—Thesc are all extinct. They differ from the Nautili in having the shell often straight, or merely curved ; in the smallness of the last chamlier for containing the body of the animal, and in the apert
. Handbook of zoology with examples from Canadian species, recent and fossil [microform]. Zoology; Invertebrates; Zoologie; Invertébrés. 166 PROVINCE MOLLUSCA. Nautilii)/F,.—The type of this family \s\.\\e iVauiilus pompiiius. In our Silurian and Devonian rocks we have species of the allied genera lAtuites and ClvDienia, and a fine lyautilus occurs in the Carboniferous (Fig. 218). £—Thesc are all extinct. They differ from the Nautili in having the shell often straight, or merely curved ; in the smallness of the last chamlier for containing the body of the animal, and in the aperture being contracted. Many of them have the siphunclc or tube leading through the chambers singularly com- plicated. .Some of the species were of very great size, the shells %. 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
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