. A system of anatomy for the use of students of medicine (Volume 1). he name of rete mucosum, and which, hardened upon thesurface constitutes the horny matter of the epidermis. To seethese well with the microscope, it is necessary to have a piece offresh skin well injected with blood. There is then to be seen atthe base of the derm, little reddish glands, irregular on the surfaceand grooved by blood-vessels. They are enveloped in cellularmembrane and surrounded by a multitude of minute adiposevesicles. From the top of each of these glands as seen in Fig. 30,* passes up a duct,which opens on t
. A system of anatomy for the use of students of medicine (Volume 1). he name of rete mucosum, and which, hardened upon thesurface constitutes the horny matter of the epidermis. To seethese well with the microscope, it is necessary to have a piece offresh skin well injected with blood. There is then to be seen atthe base of the derm, little reddish glands, irregular on the surfaceand grooved by blood-vessels. They are enveloped in cellularmembrane and surrounded by a multitude of minute adiposevesicles. From the top of each of these glands as seen in Fig. 30,* passes up a duct,which opens on the up-per surface of the dermd in the grooves between ~~a the papilla. Many capil-lary vessels adhere tothe tube and the gland,and a vessel of conside-rable size enters the baseof the latter. The mu-cous matter thrown onthe surface of the dermby these organs, quicklyunites with a colouringmatter, from which results the different tints of the corneous orepidermic substance, hair, nails, scales, feathers, etc., in manand other animals. This colouring is formed by the. * Fig. 30.—Chromatogenous organ torn in two places, b and c, to show the escapeof the scales, and the thread-like vessels of which this organ is composed, d, Itssmall excretory canals, torn in removing the corneous matter, e, Blennogenous ormucous gland, which throws its secretion above the chromatogenous , Fluidstate of the corneous matter, that is to say, pigmentum or scales floating in themidst of mucus, (rete mucosum of Malpighi.) g, Layers of corneous or hornymatter stratified to the right and left, more and more condensed, the nearer theyapproach the surface. Into the mucous gland is seen running a sanguineous vessel,and round it are placed a number of little whitish granules. ACCORDING TO BRESCHET AND ROUSSEL DE VAUZEME. 393 Chromatogenous* Apparatus, (See Fig. 30.) —Which is placed at right angles to the ducts of the mucousglands, at the upper surface of the derm, and at the bottom ofthe grooves.
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