. A manual of zoology. Zoology. D Fig. 180.—Otocysts of Medusfe.—.4, Cunina ; B, Rhopolnnema : C Carmarinn (Trachy- medusse) ; /A Octorcliis (Leptomedusan). o, epithelium ; ;i, auditory ceUs ; W, origin of hairs ; hh, auditory hairs ; hp, auditory cushion ; .. otolitha • n audi- tory nerve ; ni\ nerve ring. velum (which hangs down when at rest—fig. 178, A) contracts like a diaphragm across the mouth of the l)ell (lig. 178, B). Since water is thus forced out through the opening the medusa is forced forward by the reaction. The circular muscles of umbrella and velum are separated by the nerve ri
. A manual of zoology. Zoology. D Fig. 180.—Otocysts of Medusfe.—.4, Cunina ; B, Rhopolnnema : C Carmarinn (Trachy- medusse) ; /A Octorcliis (Leptomedusan). o, epithelium ; ;i, auditory ceUs ; W, origin of hairs ; hh, auditory hairs ; hp, auditory cushion ; .. otolitha • n audi- tory nerve ; ni\ nerve ring. velum (which hangs down when at rest—fig. 178, A) contracts like a diaphragm across the mouth of the l)ell (lig. 178, B). Since water is thus forced out through the opening the medusa is forced forward by the reaction. The circular muscles of umbrella and velum are separated by the nerve ring, with which arc connected the sensory organs- eyes of the simplest type: red pigment spots with or without a lens (fig. ,S1); and open or closed auditory vesicles (otocysts). Tactile hairs are abundant on the 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. New York, H. Holt and Company
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1902
