. An introduction to the study of zoology : by T. H. Huxley, F. R. S. ; with eighty-two illustrations. Crayfish; Zoology. 162 THE MORPHOLOGY OF THE COMMON CBAYFISH. gether with the sudden widening of the same parts in the posterior cephalic somites, gives rise to the lateral depression (fig. 39, cf) in which the scaphognathite lies. The limit thus indicated corresponds with that marked by the cervical groove upon the surface of the carapace, and separates the head from the thorax. The three pair of maxiUipedes (7, 8, 9), the forceps {10), the ambulatory. "JIJIU Fig. 43.—Astacus flweiatili
. An introduction to the study of zoology : by T. H. Huxley, F. R. S. ; with eighty-two illustrations. Crayfish; Zoology. 162 THE MORPHOLOGY OF THE COMMON CBAYFISH. gether with the sudden widening of the same parts in the posterior cephalic somites, gives rise to the lateral depression (fig. 39, cf) in which the scaphognathite lies. The limit thus indicated corresponds with that marked by the cervical groove upon the surface of the carapace, and separates the head from the thorax. The three pair of maxiUipedes (7, 8, 9), the forceps {10), the ambulatory. "JIJIU Fig. 43.—Astacus flweiatilis.—'LaagtixiAixiaX section of the anterior part of the oephalothorax ( x 3). I—IX, sterna of first nine cephalo- thoracio somites; 1, eyestalk ; 2, basal joint of antennule ; 5, basal joint of antenna ; 4, mandible; a, inner division of the masticatory surface of the mandible ; a', apophysis of the mandible for muscular attachment; cp, free edge of carapace ; e, endostemite ; enpl, endo- pleurite j epm, epimeral plate; I, labrum ; m, muscular fibres con- necting epimera with interior of carapace ; mt, metastoma ; pep. procephalic 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; Huxley, Thomas Henry, 1825-1895. Crayfish. New York : D. Appleton
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1901
