. Animal biology. Zoology; Biology. 430 METAZOAN PHYLA outer end of the tunnel opening under the water. The egg is not incu- bated but it soon hatches and the young is fed from milk produced by- milk glands. However, there are no teats, the milk being passed into two grooves on the ventral side of the mother's body. In nursing, the mother lies upon her back and the young animal laps the milk from the milk grooves. The spiny anteater. Echidna, possesses a temporary pouch in which the eggs are incubated. -Olfactory bulb ^ /Cerebrum. Cerebellum Fig. 320.—Brain of European rabbit, Lepus cunicuhis
. Animal biology. Zoology; Biology. 430 METAZOAN PHYLA outer end of the tunnel opening under the water. The egg is not incu- bated but it soon hatches and the young is fed from milk produced by- milk glands. However, there are no teats, the milk being passed into two grooves on the ventral side of the mother's body. In nursing, the mother lies upon her back and the young animal laps the milk from the milk grooves. The spiny anteater. Echidna, possesses a temporary pouch in which the eggs are incubated. -Olfactory bulb ^ /Cerebrum. Cerebellum Fig. 320.—Brain of European rabbit, Lepus cunicuhis Linnaeus, seen from the side. {From a Ziegler model, after Wiedersheim.) The roots of the cranial nerves are marked by roman numerals. 443. Marsupials.—In the case of the Marsupiaha (mar su pi a' li a; G., marsypion, pouch) the egg has a thin membrane and only a little albumen. It is retained in the uterus, the young being nourished through the embryonic membranes, which are in contact with the uterine wall. Rarely a primitive allantoic placenta is developed. The young is born in an exceedingly immature condition and makes its way or is transferred by the mother to a brood pouch, or marsupium, on the ventral surface of her abdomen. Here it attaches itself to a teat, remaining so attached. 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 Wolcott, Robert Henry, 1868-1934; University of Nebraska (Lincoln campus). Dept. of Zoology. New York ; London : McGraw-Hill Book Company, Inc.
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