. Revision of the Amphibia and Pisces of the Permian of North America. s to the genus Diplocaulus. Revised description: So far as our knowledge now goes, the original descrip-tion seems adequate for this uncertain form. A specimen of this 4523 Am. Mus., strongly suggests relationship to Trimerorhachis. Suborder TEMNOSPONDYLl Zittel. A. RHACHITOMUS division. Family ERYOPID>E Cope. Cope, Am. Nat., vol. xvi, 1882, p. 334. Proc. Am. Phil. Soc, vol. xx, 1882, Syllabus of Lectures, 1891, p. 29. Syllabus of Lectures, 1898, p. 46. Original description: In the first paper Cope
. Revision of the Amphibia and Pisces of the Permian of North America. s to the genus Diplocaulus. Revised description: So far as our knowledge now goes, the original descrip-tion seems adequate for this uncertain form. A specimen of this 4523 Am. Mus., strongly suggests relationship to Trimerorhachis. Suborder TEMNOSPONDYLl Zittel. A. RHACHITOMUS division. Family ERYOPID>E Cope. Cope, Am. Nat., vol. xvi, 1882, p. 334. Proc. Am. Phil. Soc, vol. xx, 1882, Syllabus of Lectures, 1891, p. 29. Syllabus of Lectures, 1898, p. 46. Original description: In the first paper Cope suggested the recognitionof a new suborder, the Rhachitomi, which he divided into two families: Occipital condyle concave, undivided TrimerorhachidcB Occipital condyle divided into two lateral condyles Eryopida Revised description of the family: 1. Small to large. Reaching from 2 to meters in length. 2. Occipital condyles distinct. 3. Otic notch small. 4. Parasphenoid large joining a basioccipital posteriorly. 5. A single sacral rib. 6. No dermal armor on 24 AMPHIBIA AND PISCES OF THE PERMIAN OF NORTH AMERICA 7. Clavicles and interclavicles without sculpture. 8. Cleithrum present. 9. Humerus heavy, ends at right angles to each other. 10. Femur with prominent ridge on ventral surface. 11. The two halves of the neural spine united. 12. Intercentrum thick and heavy, nearly closing notochordal space. Genus ERYOPS Cope. Cope, Eryops, Proc. Am. Phil. Soc, vol. xvii, 1878, p. 188; Proc. Am. Phil. Soc, vol. XVII, 1878, p. 520; Proc. Am. Phil. Soc, vol. xix, 1880, p. , Eryops, Paleontographica, Bd. xlvi, 1899, s. , Epicordylus, Proc. Am. Phil. Soc, vol. xvii, p. , Proc. Am. Phil. Soc, vol. xvii, p. 526. Type: A good skull with lower jaws and numerous vertebrae and bonesof the girdles. No. 4189 Am. Mus. Nat. Hist. Cope Coll. From Texas. Original description: Of the genus Eryops, the original descriptions ofthe synonyms are given below. The skull
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