. A manual of zoology. Zoology. Fig. 365. Fig. 366- Fig. 365.—Campodea staphylinus (from ). A, abdomen; C, head; T, thorax. Fig. 366.—Euscorpius italicus. a, abdomen; c, cephalothorax; p, post-abdomen; s, sting; i, chelicerx, 2, pedipalpi; 3-6, walking legs. Below chelicera enlarged. reduction of regions occurs when the head and thorax unite (fig. 367, Ct) to form a cephalothorax; or the number of regions may be increased (fig. 366) by a division of the abdomen into abdomen proper {a) and post- abdomen {p). Finally, in many arthropods (, the mites or acarina, fig. 368) it is impossi
. A manual of zoology. Zoology. Fig. 365. Fig. 366- Fig. 365.—Campodea staphylinus (from ). A, abdomen; C, head; T, thorax. Fig. 366.—Euscorpius italicus. a, abdomen; c, cephalothorax; p, post-abdomen; s, sting; i, chelicerx, 2, pedipalpi; 3-6, walking legs. Below chelicera enlarged. reduction of regions occurs when the head and thorax unite (fig. 367, Ct) to form a cephalothorax; or the number of regions may be increased (fig. 366) by a division of the abdomen into abdomen proper {a) and post- abdomen {p). Finally, in many arthropods (, the mites or acarina, fig. 368) it is impossible to recognize regions or somites because internal fusion of parts has obliterated the external evidences of segmentation. In order clearly to understand what is meant by head, thorax, etc., requires a consideration of the second character distinguishing the arthro- pods from the annelids, the jointed appendages, which give the name to the former group. The arthropodan appendages are highly developed. 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
