. A manual of zoology. Zoology. us ARTIIROPODA. next four segments bear spiracles which lead to four pairs of lung sacs. The heart is abdominal and the ' liver' diverticula are con- fined to the same region. The large number of abdominal ganglia distinct from the oesophageal ring is also characteristic. From three to six pairs of eyes occur. The scorpions are inhabitants of warm regions, ranging north with us to the Carolinas and Nebrasl^a. JBiifJius* Centrurus* Order II. Phrynoidea (Pedipalpi, Thelyphonida). The thoracic segments are fused, and of the appendages only the last three are walkin
. A manual of zoology. Zoology. us ARTIIROPODA. next four segments bear spiracles which lead to four pairs of lung sacs. The heart is abdominal and the ' liver' diverticula are con- fined to the same region. The large number of abdominal ganglia distinct from the oesophageal ring is also characteristic. From three to six pairs of eyes occur. The scorpions are inhabitants of warm regions, ranging north with us to the Carolinas and Nebrasl^a. JBiifJius* Centrurus* Order II. Phrynoidea (Pedipalpi, Thelyphonida). The thoracic segments are fused, and of the appendages only the last three are walking feet, the third pair having the last joint (tarsus) developed into a long many-jointed tactile flagel-. FiG. 462.—yV(i-f/?nfs (-P/n-^H/') rentfuriiu's. iFrom Schmarda.) lum. The cheliceras arc strong and sp)ined, but end in a claw, not in a pincer. The cheliceras are also clawed and are possibly poison organs, since the bite of these animals is feared. The abdomen consists of eleven or twelve somites and contains two pairs of lungs. There arc eight eyes—two large ones in the middle of the cephalo- thorax, and three small ones on either side. The species are tropicab PTtrijniis (fig. 4C0) lias a simple abdomen ; Tlielijphomis* (fig. 405, D) has a short postabdomeu which bears a long, many-jointed thread. One species in the southwestern United States. Order III. Microthelyphonida. Small animals as yet known only from Texas. Sicily, Paraguay, and Siam. They have a general resemldance to a scorpion, the clielicorfB are three-jointed and cbolate, the pedipalpi simple, neither tliese nor any of the legs having chewing lameUai. The head is distinct from two 'thoracic segments," the abdomen is eleven- jointed and is terminated by a long many-jointed oatidal 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 th
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