. Comparative anatomy of vertebrates. Anatomy, Comparative; Vertebrates -- Anatomy. FIG. 179. FIG. 180. FIG. 179.—Sense organ of lateral line of Diemyctylus (aquatic form) freely after Kings- bury, C' cone cells; 5, spindle cells. FIG. 180.—Developing lateral line organ on one side of head of Amia, showing method of closure of grooves to canals, after Allis. an, anterior naris; io, so, infra- and supraorbital lines; pn, posterior naris. In the cyclostomes and aquatic amphibia each sensory patch sinks into a separate pit (fig. 179), but in all other itchhyopsida the lines of organs sink in the
. Comparative anatomy of vertebrates. Anatomy, Comparative; Vertebrates -- Anatomy. FIG. 179. FIG. 180. FIG. 179.—Sense organ of lateral line of Diemyctylus (aquatic form) freely after Kings- bury, C' cone cells; 5, spindle cells. FIG. 180.—Developing lateral line organ on one side of head of Amia, showing method of closure of grooves to canals, after Allis. an, anterior naris; io, so, infra- and supraorbital lines; pn, posterior naris. In the cyclostomes and aquatic amphibia each sensory patch sinks into a separate pit (fig. 179), but in all other itchhyopsida the lines of organs sink in the same way, the patches being connected by grooves. In Chim<zra these grooves remain open, but in all others they are closed except at certain points where pores connect the canals formed by the closed grooves with the exterior. In this way the sensory areas come to lie in canals beneath the surface, water obtaining access to them through the pores. In many teleosts (fig. 181) the pores pass through notches or openings in the scales, while on the head the canals themselves frequently run through some of the cranial bones. Of considerable morphological importance, especially in connection with the morphology of the ear, are the facts that the sensory areas multiply by elongation, followed by division, and that the pores themselves increase in the same way. 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 Kingsley, J. S. (John Sterling), 1854-1929. Philadelphia, P. Blakiston's son & co.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1912
