. The crayfish : an introduction to the study of zoology . Crayfish. THE EAR OF THE CRAYFISH. 117 and sometimes of other foreign matter. A nerve (n n ,) is distributed to the sac, and its fibres enter the bases of the hairs, and may be traced to their apices, where they end in peculiar elongated rod-like bodies (fig. 27, C). Here is an auditory organ of the simplest Fig. 27.—Astacus fluviatUis. A, the auditory sac detached and seen from the outside ( x 15) ; B, auditory hair ( x 100) ; C, the distal ex- tremity of the same more highly magnified, a, aperture of sac ; as,' auditory
. The crayfish : an introduction to the study of zoology . Crayfish. THE EAR OF THE CRAYFISH. 117 and sometimes of other foreign matter. A nerve (n n ,) is distributed to the sac, and its fibres enter the bases of the hairs, and may be traced to their apices, where they end in peculiar elongated rod-like bodies (fig. 27, C). Here is an auditory organ of the simplest Fig. 27.—Astacus fluviatUis. A, the auditory sac detached and seen from the outside ( x 15) ; B, auditory hair ( x 100) ; C, the distal ex- tremity of the same more highly magnified, a, aperture of sac ; as,' auditory setae ; b, its inner or posterior extremity; n n', nerves ; r, It retains, in fact, throughout life, the condition of a simple sac or involution of the integument, such as is that of the vertebrate ear in its earliest 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 : Kegan Paul, Trench, Tru?bner & Co.
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Keywords: ., bookauthorhuxleyth, bookcentury1900, bookdecade1900, bookyear1906
