. Annual report of the Regents. New York State Museum; Science. 452 Kepoet of the State Geologist, The fresh-water form, Paludioella, and all marine forms have the lophophore circular and the tentacles arranged in a single row on its outer border, having, when expanded, somewhat the form of an inverted cone. The tentacles are cylindrical, with a blunted extremity. They are hollow and are composed of two layers (fig. 23); the outer layer being composed of comparatively large spherical cells, frequently with a brilliant nucleus, and the inner layer of a very thin transparent membrane, without an
. Annual report of the Regents. New York State Museum; Science. 452 Kepoet of the State Geologist, The fresh-water form, Paludioella, and all marine forms have the lophophore circular and the tentacles arranged in a single row on its outer border, having, when expanded, somewhat the form of an inverted cone. The tentacles are cylindrical, with a blunted extremity. They are hollow and are composed of two layers (fig. 23); the outer layer being composed of comparatively large spherical cells, frequently with a brilliant nucleus, and the inner layer of a very thin transparent membrane, without any trace of a cellular structure. The exterior of the tentacles has two rows of vibratile cilia, situated on opposite sides, one row vibrating toward the extremity and the other toward the base. The tentacles are hollow and communicate with the perigastric cavity through the lophophore. In all the Hippocrepian forms the tentacles are surrounded, on their lower portion, by an exceed- t a. Fig. 22. Lophopus cristatus. a, Tentacles; &, Calyx; c, Lophophore; d, Intestine; e, Invaginated portion of the endocyst; /, Nerve ganglion; g, Nerve filament co lophophore; 7i., Nerve filament passing around the lophophore ; i, Anus; k, Epistome; k', Orifice in lophophore forming a communication between the cavity of the epistome and the perigastric space; I, Elevator muscle of the epistome (after Allman).. 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 New York State Museum; University of the State of New York. Board of Regents. Albany : J. B. Lyon, State Printer
Size: 1492px × 1675px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorne, bookcentury1800, bookdecade1880, booksubjectscience
