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EXPLANATION

OF

PLATE 17.

Fig. 1—4. Diagrams of the facial muscles of Mammals, save the muscles of the external ear. 1 the superficial
muscles, 2—4 successively deeper muscles, p. auricul., p. intermedia, p. palpebr. and p. oris are the various
portions of the musculus sphincter profundus.

Fig. 5—14. Diagrams of sagittal sections of the snout, resp. the proboscis, of various Mammals. The diagrams
illustrate the morphology of the proboscis, i incisor, n nostril, p hard palate. The skin round the nares
is marked by a broad Mack line, the front side of the upper lip by a red one, and the posterior side of the
same by a deep blue one. The bones are yellow, the cartilage light blue, connective tissue grey. — In the
Talpa-foetus (fig. 11) the portion of the skin marked by the red line has still a vertical, not a horizontal position
as in the adult (fig. 10). — Comp. for the other figures the text p. 47—50.