. A manual of zoology. Zoology. " ki. Fig. 3. Fig. 4. Fig. 3.—Human embryo, mm. long (after His). Pericardium and lateral body wall opened, yolk-sac and allantois cut away, course of blood-vessels shown; a, arterial trunk; al, allantois stalk; c, precava, uniting with yolk and umbilical veins; d, intestine; do, yolk stalk; h, ear vesicle; K, ventricle of heart; 0, upper jaw; r, olfactory groove; 5, tail; u, lower jaw; us, somites; V, atrium of heart; 1-5, the five arterial arches. Fig. 4.—Tadpoles of Rana teniporaria. m, mouth; g, upper jaw; s, lower jaw; s, sucking-disc; kb, external
. A manual of zoology. Zoology. " ki. Fig. 3. Fig. 4. Fig. 3.—Human embryo, mm. long (after His). Pericardium and lateral body wall opened, yolk-sac and allantois cut away, course of blood-vessels shown; a, arterial trunk; al, allantois stalk; c, precava, uniting with yolk and umbilical veins; d, intestine; do, yolk stalk; h, ear vesicle; K, ventricle of heart; 0, upper jaw; r, olfactory groove; 5, tail; u, lower jaw; us, somites; V, atrium of heart; 1-5, the five arterial arches. Fig. 4.—Tadpoles of Rana teniporaria. m, mouth; g, upper jaw; s, lower jaw; s, sucking-disc; kb, external gills; ik, region of the internal gills; n, nose; a, eyes; o, auditory vesicle; h, cardiac region; d, operculum. ennibranchiata (fig. 5), which stand lower in the system; they have a swimming tail and tuft-like gills, which are lacking in the adult frog. (3) There are certain parasitic Crustacea, which live upon the gills of fishes, and seem not at all like their relatives. They are shapeless masses which were formerly regarded as parasitic worms. Their systematic position was only determined by their embryology (fig. 6). Here it is. 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 Hertwig, Richard, 1850-1937; Kingsley, J. S. (John Sterling), 1854-1929, ed. and tr. New York, H. Holt
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectzoology, bookyear1912
