. Bulletin. Natural history. fa c foe f ax p. fig. 1. Components of the atlas in Thrinaxodon. A, medial; B, lateral, C, posterior; D, anterior views of the left atlas arch, BMNH R. 511. E, dorsal; F, ventral views of first (or atlas) inter- centrum, BMNH R. 511a. G, posterodorsal view of atlas centrum, BMNH R. 511a. Views A-D are arranged to display the total morphology and are not exactly in the anatomical "anterior", "posterior", etc., views. For the anatomically correct position of atlas arch and first intercentrum, see Figs. 3 and 4. X2. Abbreviations for Figs. 1-4, 6,
. Bulletin. Natural history. fa c foe f ax p. fig. 1. Components of the atlas in Thrinaxodon. A, medial; B, lateral, C, posterior; D, anterior views of the left atlas arch, BMNH R. 511. E, dorsal; F, ventral views of first (or atlas) inter- centrum, BMNH R. 511a. G, posterodorsal view of atlas centrum, BMNH R. 511a. Views A-D are arranged to display the total morphology and are not exactly in the anatomical "anterior", "posterior", etc., views. For the anatomically correct position of atlas arch and first intercentrum, see Figs. 3 and 4. X2. Abbreviations for Figs. 1-4, 6, 7, 9-11: a a, atlas arch; ap, anapophysis; cap, capitulum; Ci, atlas centrum; Ci, axis centrum; d, Ct, etc., first cervical, second cervical etc., d, dens; / a c, facet for atlas centrum ; / a i, facet for atlas intercentrum; / at a, facet for atlas arch; / at r, facet for atlantal rib; / ax p, facet for axis pedicle; / ex, facet for exoccipital; foe, facet for occipital condyle; / pra, facet for proatlas; gr, groove, possibly for muscle or ligament attach- ment; Id, atlas intercentrum; Id, axis intercentrum; Id, intercentrum of d; if, intervertebral foramen ; /, lamina; / r, ridge on the lamina, possible for muscle or ligament attachment; n, notch for first cervical nerve and associated vessels; n f, notochordal fossa; n s, neural spine; na, neural arch; nu f, nutrient foramen; pa, parapophysis; pos z, postzygapophysis; pra, proatlas; pra p, proatlas process; pre z, prezygapophysis; s, sulcus for first cervical nerve and vessels; s a a, spine of the atlas arch; tr p, transverse process; tub, 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 Peabody Museum of Natural History. New Haven, Peabody Museum of Natural History, Yale University
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Keywords: ., bookc, bookcentury1900, bookdecade1920, booksubjectnaturalhistory
