. Elements of conchology / Prepared for the use of schools and colleges. Mollusks. MUEEX.—FUSUS.—STKOMBUS. 55 dant than in our day; for, in certain formations, such as the calcareous tertiary of the environs of Paris, an immense number is found in the fossil state. 10. In the Tribe of Murex, the aperture of the shell is always prolonged into a canal, either straight or inflected {Jig. 64). The animals themselves ^ very closely resemble those of the tribe of Buccinum; they' have a trunk, no veil on the head, the right edge of the mantle furnished with lobes or filaments, and a horny operculum.
. Elements of conchology / Prepared for the use of schools and colleges. Mollusks. MUEEX.—FUSUS.—STKOMBUS. 55 dant than in our day; for, in certain formations, such as the calcareous tertiary of the environs of Paris, an immense number is found in the fossil state. 10. In the Tribe of Murex, the aperture of the shell is always prolonged into a canal, either straight or inflected {Jig. 64). The animals themselves ^ very closely resemble those of the tribe of Buccinum; they' have a trunk, no veil on the head, the right edge of the mantle furnished with lobes or filaments, and a horny operculum. They are all carnivorous and inhabit the sea. They are subdivided, ac- cording to the form of the shell, into Murex properly so called^ Fusus, Strombus, &c. 11. The Murices properly so called are distinguished by theirshell, the canal of which is projecting and straight, and the whorls are furnish- ed with transverse elevations, in form of varices or ridges, which often present spines, or ramified and slashed plates, or lamellae. 12. The Fusus has a canal formed like the common Murex; but the shell is without varices, that is, longitudinal ribs. Fig. 64.— 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 Ruschenberger, W. S. W. (William Samuel Waithman), 1807-1895; Comté, Achille, 1802-1866; Milne-Edwards, H. (Henri), 1800-1885. Philadelphia : Grigg & Elliot
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectmollusks, bookyear184
