. The comparative anatomy of the domesticated animals. Veterinary anatomy. THE MOUTH. 351 at the bottom of the infnndibnlum. Nevertheless, the quantity accumulated in this cul-de-sac is not always the same; we have seen it sometimes almost null, and on the other hand we possess incisors unworn, or nearly so, in which the cavity is almost entirely obstructed by the crusta petrosa. We are not aware that, up to the present time, any account has been taken of these differences when calculatii)g the progress of icear; but it may be imagined that they ought to influence in a sensible manner the peri
. The comparative anatomy of the domesticated animals. Veterinary anatomy. THE MOUTH. 351 at the bottom of the infnndibnlum. Nevertheless, the quantity accumulated in this cul-de-sac is not always the same; we have seen it sometimes almost null, and on the other hand we possess incisors unworn, or nearly so, in which the cavity is almost entirely obstructed by the crusta petrosa. We are not aware that, up to the present time, any account has been taken of these differences when calculatii)g the progress of icear; but it may be imagined that they ought to influence in a sensible manner the period at which effacemeut of the external dental cavity takes place. Fig. INCISOR TEETH OP THE HORSE. DETAILS OF STRUCTURE. 1, A tooth in which is indicated the general shape of a permanent incisor, and the particular forms successively assumed by the dental table in consequence of friction, and the continued pushing outwards of these teeth; 2, A virgin tooth, anterior and posterior faces; 3, Longitudinal^ section of a virgin tooth, intended to show the internal conformation and structure. Kot to complicate the figure, the external cement, and that amassed in the infundibulum, has not been exhibited. 4, Transverse section for the same purpose; a, Encircling enamel; 6, Centi-al enamel; c. Dental star; d, Dentine; 5, Deciduous tooth. All the characteristics just indicated belong to the deciduous teeth (Fig. 159, 5\ except that they are smaller than the permanent; that they are of a shining milky-white colour, due to the thinness or absence of the crusta petrosa; that they show at the point of union between the free portion and the root, a constriction named the neclc ; that their crown is finely striated, and not cannular, on the anterior face; that the external cul-de-sac. 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 o
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Keywords: ., bookauthorchauveauaauguste18271, bookcentury1800, bookdecade1870
