. The crayfish : An introd. to the study of zoology. --. Crayfish; Zoology. THE JOINTS OF THE ABDOMEN. 97 The sterna are all very narrow, and are connected together by wide spaces of flexible exoskeleton. When the abdomen is made straight, it will be found that these inter sternal membranes are stretched as far as they will yield. On the other hand, when the abdomen. Fig. 21.—Astacus fluviatills.—Two of the abdominal somites, in vertical section, seen from the inner side, to show x, x , the hinges by which they are articulated with one another (x 3). The anterior of the two somites is that to
. The crayfish : An introd. to the study of zoology. --. Crayfish; Zoology. THE JOINTS OF THE ABDOMEN. 97 The sterna are all very narrow, and are connected together by wide spaces of flexible exoskeleton. When the abdomen is made straight, it will be found that these inter sternal membranes are stretched as far as they will yield. On the other hand, when the abdomen. Fig. 21.—Astacus fluviatills.—Two of the abdominal somites, in vertical section, seen from the inner side, to show x, x , the hinges by which they are articulated with one another (x 3). The anterior of the two somites is that to the right of the figure. is bent up as far as it will go, the sterna come close together, and the intersternal membranes are folded. The terga are very broad; so broad, in fact, that each overlaps its successor, when the abdomen is straightened or extended, for nearly half its length in the middle line; and the overlapped surface is smooth, convex, and h. 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 Huxley, Thomas Henry, 1825-1895. London : K. Paul, Trench, Trubner
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1896
