. Animal studies. 144 ANIMAL STUDIES parasites or as active predaceous animals upon other animals. For this purpose many are provided with keen senses for detecting their prey and poisonous spines for despatching it. 135. The scorpions.—Owing to the stout investing armor, the strong pincers, and the general form of the body, the scorpions might at first sight be mistaken for near relatives of the crayfish or lobster. A more careful examina- tion will show that the two pairs of pincers prob- ably correspond to the antennae and mandibles of the Crustacea that have become modified for seiz- ing t
. Animal studies. 144 ANIMAL STUDIES parasites or as active predaceous animals upon other animals. For this purpose many are provided with keen senses for detecting their prey and poisonous spines for despatching it. 135. The scorpions.—Owing to the stout investing armor, the strong pincers, and the general form of the body, the scorpions might at first sight be mistaken for near relatives of the crayfish or lobster. A more careful examina- tion will show that the two pairs of pincers prob- ably correspond to the antennae and mandibles of the Crustacea that have become modified for seiz- ing the food. The swol- len part of the animal lying behind the four pairs of legs is a part of the abdomen, of which the slender " tail" consti- tutes the remainder. On the tip of the tail is a curved spine supplied with poison glands. Sev- eral pairs of eyes are borne on the dorsal surface of the head and thorax, while on the under side of the animal several slit-like openings lead into as many small cavities containing the lung-books. The scorpions are the inhabitants of warm countries, where they may be found under sticks and stones through- out the day. At night they leave their homes in search of food, which consists chiefly of insects anjd spiders. These are seized by means of the pincers, and the sting is driven into them with speedily fatal results. It is doubtful if the poison causes death in man, but the sting of some of the. -Scorpion, showing pincer-like mouth- parts and spine-tipped 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
