. On mammalian descent. Being nine lectures delivered in the theatre of the Royal College of Surgeons during February, 1884. Mammals. 70 MAMMALIAN DESCENT. [Lect. III. the upper region of the mouth, and which is formed by a special ingrowth of bone from the maxillaries and palatines, is large and imperfect where the four plates. Via, 9.—Skull of an embryo Pig, 3 inches long, lower view, magnified 3^ diameters. , alae nasi (snout cartilage); , external nostrils ; ^s., premaxillary; mx, maxillary; , dental groove (for tooth-pulijs); pa, palatine ; pg, pterygoid; v, vomer; , externa
. On mammalian descent. Being nine lectures delivered in the theatre of the Royal College of Surgeons during February, 1884. Mammals. 70 MAMMALIAN DESCENT. [Lect. III. the upper region of the mouth, and which is formed by a special ingrowth of bone from the maxillaries and palatines, is large and imperfect where the four plates. Via, 9.—Skull of an embryo Pig, 3 inches long, lower view, magnified 3^ diameters. , alae nasi (snout cartilage); , external nostrils ; ^s., premaxillary; mx, maxillary; , dental groove (for tooth-pulijs); pa, palatine ; pg, pterygoid; v, vomer; , external pterygoid plate ; bs, basi-sphenoid; , glenoid fossa (hinge cartilage for lower jaw); ty, tympanic bone ; ob, os-bullse (additional tympanic bone); bo, basi-ocoipital; , paroccipital process; occ, occipital condyle (hinge for first vertebra or atlas); eo, exoccipital; so, superoccipital; , foramen magnum (great opening); IX. X. XII., holes for the exit of the 9th, 10th, and 12th cranial nerves. should meet. It is less imperfect in the embryo than afterwards, but the bone-cells are very thinly scattered. 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 Parker, William Kitchen, 1823-1890. London, Griffin
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectmammals, bookyear1885
