. Text-book of zoology for junior students. Zoology. Fig. iXi. — T,'rcbmt«lii {U'ulilheimia I Jlai\'Xrns. A, Tiie sin 11 viewed IVniii licliiiirl, sliowiiig the drjrs;il ^alve, and tlie iierforated suniniit of tin' ventral \al\'i' aliove it. B, Inner view of tlie dorsal \'al\'e, showing the shelly loDp (?) wliicli stijiports the spiral arms. C, Inner ^iew of the venti'al valve, showing the foramen or ajierture (/) in the Ijeal;, thi-ough whieh the niusenlar stalk of attaehment passes. D, J^ongitndiiial ami vertieal si'etion of the animal, ^ the sjiival arms (c), the stcniiaeh (s), and
. Text-book of zoology for junior students. Zoology. Fig. iXi. — T,'rcbmt«lii {U'ulilheimia I Jlai\'Xrns. A, Tiie sin 11 viewed IVniii licliiiirl, sliowiiig the drjrs;il ^alve, and tlie iierforated suniniit of tin' ventral \al\'i' aliove it. B, Inner view of tlie dorsal \'al\'e, showing the shelly loDp (?) wliicli stijiports the spiral arms. C, Inner ^iew of the venti'al valve, showing the foramen or ajierture (/) in the Ijeal;, thi-ough whieh the niusenlar stalk of attaehment passes. D, J^ongitndiiial ami vertieal si'etion of the animal, ^ the sjiival arms (c), the stcniiaeh (s), and the liver (*). At / i,'' the (j|iening in the heak, with the .stalk of attaehnn-nt (,.) jiassing thrniigh it. (After Davidson and Owen.) Some details have Ijeeu omitted in ligs. B, C, and D, for the sake of elearni ss. branches, and termed the "arms" ('fig. '{?,!'), 1)\ These arms are usually closely coiled up, and serve to olitain food for the animal. It is freim these organs that the name of the class is derived (Gr. hnii:/iiiiii, arm ; and piuji'x, feet). The arms also seive as res])iratory , and in many forms they are .stipported on an internal calca- reous framesvorii or skeleton, sometimes called the "carriage-spring 'ilns,". 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 Nicholson, Henry Alleyne, 1844-1899. New York, American Book Co
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1885
