. Bulletin - United States National Museum. Science. c Fig. 109.—Thalia democeatica, aggregated form, dorsal views of atrial siphons which have been cut open on the mid-ventral line and the flaps laid out laterally: a, from a pacific Ocean specimen; B, from a New England coast form; C, from a specimen collected off New- port, Rhode Island; D, copied from Streiff (1908) The eyes of the aggregated Thalia democratica (figs. 110, 111, and 112) are very different from those of the other subgenera, but the structural conditions and the development indicate the homologies. Three distinct portions of
. Bulletin - United States National Museum. Science. c Fig. 109.—Thalia democeatica, aggregated form, dorsal views of atrial siphons which have been cut open on the mid-ventral line and the flaps laid out laterally: a, from a pacific Ocean specimen; B, from a New England coast form; C, from a specimen collected off New- port, Rhode Island; D, copied from Streiff (1908) The eyes of the aggregated Thalia democratica (figs. 110, 111, and 112) are very different from those of the other subgenera, but the structural conditions and the development indicate the homologies. Three distinct portions of the eye are seen on the antero-ventral surface of the ganglion, an anterior, larger portion (ex), and two somewhat asymetrical posterior portions {e'l and e'2). 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 United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
