. Animal studies. 306 ANIMAL STUDIES thrust into a pouch or fold of skin along the abdomen, where they are kept until they are able to take care of them- selves (Fig. 174). This is an interesting and ingenious adaptation, but less specialized and less perfect an adaptation than the conditions found in ordinary mam- mals. Among the insects, the special provisions for the protection and care of the eggs and the young are wide-spread and various. Some of those adaptations which take the special form of nests or " homes" are described in the volume on Animal Life. The eggs of the common
. Animal studies. 306 ANIMAL STUDIES thrust into a pouch or fold of skin along the abdomen, where they are kept until they are able to take care of them- selves (Fig. 174). This is an interesting and ingenious adaptation, but less specialized and less perfect an adaptation than the conditions found in ordinary mam- mals. Among the insects, the special provisions for the protection and care of the eggs and the young are wide-spread and various. Some of those adaptations which take the special form of nests or " homes" are described in the volume on Animal Life. The eggs of the common cockroach are laid in small packets inclosed in a firm wall (Fig. 176). The eggs of the great water-bugs are carried on the back of the male (Fig. 177); and the spiders lay their eggs in a silken sac or cocoon, and some of the ground or. Fig. 177.— Giant water-bug (Serphus). Male carrying eggs on its back. Fig. 178.—Cocoon inclosing the pupa of the great Ceanothus moth. Spun of silk by the larva before pupation. running spiders {Lycosiclce) drag this egg-sac, attached to the tip of the abdomen, about with them. The young spiders when hatched live for some days inside this sac. feeding on each other! Many insects have long, sharp. 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 Jordan, David Starr, 1851-1931; Kellogg, Vernon L. [from old catalog].
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Keywords: ., bookauthorjordanda, bookcentury1900, bookdecade1900, bookyear1903
