. Bulletins of American paleontology. 6o Bulletin 134 60 projection of the inner margin of the forceps. Further contrast ij found in the mancHhles, which present uniform frontal pLates and incurved, separate shafts in PaitUiiites, while the two modern families have a sharply delimited whitish incrustation covering the anterior region of the frontal plates, and straight or outwardly curved shafts which, moreover, are fused along a considerable portion of the inner margins (text figs. 2, 4). In addition to the above-mentioned differences, the polychsetes of the family Lumbrineridse have symmetri
. Bulletins of American paleontology. 6o Bulletin 134 60 projection of the inner margin of the forceps. Further contrast ij found in the mancHhles, which present uniform frontal pLates and incurved, separate shafts in PaitUiiites, while the two modern families have a sharply delimited whitish incrustation covering the anterior region of the frontal plates, and straight or outwardly curved shafts which, moreover, are fused along a considerable portion of the inner margins (text figs. 2, 4). In addition to the above-mentioned differences, the polychsetes of the family Lumbrineridse have symmetrically paired buccal plates, disposed in a row, and no unpaired piece (text fig. 3).. Figure II. Showing the composition of the jaw apparatuses of Eecent polychaetes. Figures after Treadwell (1921). Arabella ;ia Treailwell; fig. 5, articulate maxillary assemblage, terminal third of carrier shafts not figured, X15; fig. 6, conjugate mandibles, X15. DorvUhn rubra (Grube) ; fig. 7, articulate maxillary assemblage, X16; fig. 8, conjugate mandibles, X16,. 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 Paleontological Research Institution (Ithaca, N. Y. ); Columbia University. Ithaca, N. Y. , Paleontological Research Institution [etc. ]
Size: 1215px × 2058px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorpaleontologicalresearchinstitutionit, bookcentury1900
